diff --git a/composer.json b/composer.json
deleted file mode 100644
index 6742c642d3..0000000000
--- a/composer.json
+++ /dev/null
@@ -1,69 +0,0 @@
-{
-	"name": "wordpress/wordpress",
-	"description": "WordPress is web software you can use to create a beautiful website or blog.",
-	"keywords": [
-		"blog",
-		"cms"
-	],
-	"type": "wordpress-core",
-	"homepage": "https://wordpress.org/",
-	"license": "GPL-2.0+",
-	"authors": [
-		{
-			"name": "WordPress Community",
-			"homepage": "https://wordpress.org/about/"
-		}
-	],
-	"support": {
-		"issues": "https://core.trac.wordpress.org/",
-		"forum": "https://wordpress.org/support/",
-		"wiki": "https://codex.wordpress.org/",
-		"irc": "irc://irc.freenode.net/wordpress",
-		"source": "https://core.trac.wordpress.org/browser"
-	},
-	"require": {
-		"xrstf/composer-php52": "^1.0"
-	},
-	"scripts": {
-		"post-install-cmd": [
-			"xrstf\\Composer52\\Generator::onPostInstallCmd"
-		],
-		"post-update-cmd": [
-			"xrstf\\Composer52\\Generator::onPostInstallCmd"
-		],
-		"post-autoload-dump": [
-			"xrstf\\Composer52\\Generator::onPostInstallCmd"
-		]
-	},
-	"autoload": {
-		"classmap": [
-			"wp-includes/",
-			"wp-admin/"
-		],
-		"exclude-from-classmap": [
-			"wp-admin/includes/deprecated.php",
-			"wp-includes/atomlib.php",
-			"wp-includes/cache.php",
-			"wp-includes/class-json.php",
-			"wp-includes/class-phpmailer.php",
-			"wp-includes/class-requests.php",
-			"wp-includes/class-simplepie.php",
-			"wp-includes/class-snoopy.php",
-			"wp-includes/compat.php",
-			"wp-includes/pluggable-deprecated.php",
-			"wp-includes/rss.php",
-			"wp-includes/ID3/",
-			"wp-includes/pomo/",
-			"wp-includes/random_compat/error_polyfill.php",
-			"wp-includes/Requests/",
-			"wp-includes/SimplePie/",
-			"wp-includes/Text/",
-			"wp-includes/widgets/"
-		]
-	},
-	"config": {
-		"classmap-authoritative": true,
-		"optimize-autoloader": true,
-		"vendor-dir": "wp-vendor"
-	}
-}
diff --git a/composer.lock b/composer.lock
deleted file mode 100644
index b06c1afe61..0000000000
--- a/composer.lock
+++ /dev/null
@@ -1,50 +0,0 @@
-{
-    "_readme": [
-        "This file locks the dependencies of your project to a known state",
-        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
-        "This file is @generated automatically"
-    ],
-    "hash": "a72f57ac77499086388d3fd01787fc07",
-    "content-hash": "4b675f5b2ea4e6f58fcbdf81132e35bb",
-    "packages": [
-        {
-            "name": "xrstf/composer-php52",
-            "version": "v1.0.20",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/composer-php52/composer-php52.git",
-                "reference": "bd41459d5e27df8d33057842b32377c39e97a5a8"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/composer-php52/composer-php52/zipball/bd41459d5e27df8d33057842b32377c39e97a5a8",
-                "reference": "bd41459d5e27df8d33057842b32377c39e97a5a8",
-                "shasum": ""
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-default": "1.x-dev"
-                }
-            },
-            "autoload": {
-                "psr-0": {
-                    "xrstf\\Composer52": "lib/"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "time": "2016-04-16 21:52:24"
-        }
-    ],
-    "packages-dev": [],
-    "aliases": [],
-    "minimum-stability": "stable",
-    "stability-flags": [],
-    "prefer-stable": false,
-    "prefer-lowest": false,
-    "platform": [],
-    "platform-dev": []
-}
diff --git a/wp-includes/version.php b/wp-includes/version.php
index ca7501c0bd..3bb5fdd9be 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-alpha-38479';
+$wp_version = '4.7-alpha-38480';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
diff --git a/wp-vendor/autoload_52.php b/wp-vendor/autoload_52.php
deleted file mode 100644
index b19e33b9cb..0000000000
--- a/wp-vendor/autoload_52.php
+++ /dev/null
@@ -1,7 +0,0 @@
-<?php
-
-// autoload_52.php generated by xrstf/composer-php52
-
-require_once dirname(__FILE__) . '/composer'.'/autoload_real_52.php';
-
-return ComposerAutoloaderInit84e65be829c2294b794a94e0a8b5807c::getLoader();
diff --git a/wp-vendor/composer/ClassLoader52.php b/wp-vendor/composer/ClassLoader52.php
deleted file mode 100644
index d721c7e76b..0000000000
--- a/wp-vendor/composer/ClassLoader52.php
+++ /dev/null
@@ -1,271 +0,0 @@
-<?php
-/*
- * Copyright (c) 2013, Christoph Mewes, http://www.xrstf.de
- *
- * This file is released under the terms of the MIT license. You can find the
- * complete text in the attached LICENSE file or online at:
- *
- * http://www.opensource.org/licenses/mit-license.php
- *
- * --------------------------------------------------------------------------
- *
- * 99% of this is copied as-is from the original Composer source code and is
- * released under MIT license as well. Copyright goes to:
- *
- * - Fabien Potencier <fabien@symfony.com>
- * - Jordi Boggiano <j.boggiano@seld.be>
- */
-
-class xrstf_Composer52_ClassLoader {
-	private $prefixes              = array();
-	private $fallbackDirs          = array();
-	private $useIncludePath        = false;
-	private $classMap              = array();
-	private $classMapAuthoratative = false;
-	private $allowUnderscore       = false;
-
-	/**
-	 * @param boolean $flag  true to allow class names with a leading underscore, false to disable
-	 */
-	public function setAllowUnderscore($flag) {
-		$this->allowUnderscore = (boolean) $flag;
-	}
-
-	/**
-	 * @return array
-	 */
-	public function getPrefixes() {
-		return $this->prefixes;
-	}
-
-	/**
-	 * Turns off searching the prefix and fallback directories for classes
-	 * that have not been registered with the class map.
-	 *
-	 * @param bool $classMapAuthoratative
-	 */
-	public function setClassMapAuthoritative($classMapAuthoratative) {
-		$this->classMapAuthoratative = $classMapAuthoratative;
-	}
-
-	/**
-	 * Should class lookup fail if not found in the current class map?
-	 *
-	 * @return bool
-	 */
-	public function getClassMapAuthoratative() {
-		return $this->classMapAuthoratative;
-	}
-
-	/**
-	 * @return array
-	 */
-	public function getFallbackDirs() {
-		return $this->fallbackDirs;
-	}
-
-	/**
-	 * @return array
-	 */
-	public function getClassMap() {
-		return $this->classMap;
-	}
-
-	/**
-	 * @param array $classMap  class to filename map
-	 */
-	public function addClassMap(array $classMap) {
-		if ($this->classMap) {
-			$this->classMap = array_merge($this->classMap, $classMap);
-		}
-		else {
-			$this->classMap = $classMap;
-		}
-	}
-
-	/**
-	 * Registers a set of classes, merging with any others previously set.
-	 *
-	 * @param string       $prefix   the classes prefix
-	 * @param array|string $paths    the location(s) of the classes
-	 * @param bool         $prepend  prepend the location(s)
-	 */
-	public function add($prefix, $paths, $prepend = false) {
-		if (!$prefix) {
-			if ($prepend) {
-				$this->fallbackDirs = array_merge(
-					(array) $paths,
-					$this->fallbackDirs
-				);
-			}
-			else {
-				$this->fallbackDirs = array_merge(
-					$this->fallbackDirs,
-					(array) $paths
-				);
-			}
-
-			return;
-		}
-
-		if (!isset($this->prefixes[$prefix])) {
-			$this->prefixes[$prefix] = (array) $paths;
-			return;
-		}
-
-		if ($prepend) {
-			$this->prefixes[$prefix] = array_merge(
-				(array) $paths,
-				$this->prefixes[$prefix]
-			);
-		}
-		else {
-			$this->prefixes[$prefix] = array_merge(
-				$this->prefixes[$prefix],
-				(array) $paths
-			);
-		}
-	}
-
-	/**
-	 * Registers a set of classes, replacing any others previously set.
-	 *
-	 * @param string       $prefix  the classes prefix
-	 * @param array|string $paths   the location(s) of the classes
-	 */
-	public function set($prefix, $paths) {
-		if (!$prefix) {
-			$this->fallbackDirs = (array) $paths;
-			return;
-		}
-
-		$this->prefixes[$prefix] = (array) $paths;
-	}
-
-	/**
-	 * Turns on searching the include path for class files.
-	 *
-	 * @param bool $useIncludePath
-	 */
-	public function setUseIncludePath($useIncludePath) {
-		$this->useIncludePath = $useIncludePath;
-	}
-
-	/**
-	 * Can be used to check if the autoloader uses the include path to check
-	 * for classes.
-	 *
-	 * @return bool
-	 */
-	public function getUseIncludePath() {
-		return $this->useIncludePath;
-	}
-
-	/**
-	 * Registers this instance as an autoloader.
-	 */
-	public function register() {
-		spl_autoload_register(array($this, 'loadClass'), true);
-	}
-
-	/**
-	 * Unregisters this instance as an autoloader.
-	 */
-	public function unregister() {
-		spl_autoload_unregister(array($this, 'loadClass'));
-	}
-
-	/**
-	 * Loads the given class or interface.
-	 *
-	 * @param  string $class  the name of the class
-	 * @return bool|null      true, if loaded
-	 */
-	public function loadClass($class) {
-		if ($file = $this->findFile($class)) {
-			include $file;
-			return true;
-		}
-	}
-
-	/**
-	 * Finds the path to the file where the class is defined.
-	 *
-	 * @param  string $class  the name of the class
-	 * @return string|null    the path, if found
-	 */
-	public function findFile($class) {
-		if ('\\' === $class[0]) {
-			$class = substr($class, 1);
-		}
-
-		if (isset($this->classMap[$class])) {
-			return $this->classMap[$class];
-		}
-		elseif ($this->classMapAuthoratative) {
-			return false;
-		}
-
-		$classPath = $this->getClassPath($class);
-
-		foreach ($this->prefixes as $prefix => $dirs) {
-			if (0 === strpos($class, $prefix)) {
-				foreach ($dirs as $dir) {
-					if (file_exists($dir.DIRECTORY_SEPARATOR.$classPath)) {
-						return $dir.DIRECTORY_SEPARATOR.$classPath;
-					}
-				}
-			}
-		}
-
-		foreach ($this->fallbackDirs as $dir) {
-			if (file_exists($dir.DIRECTORY_SEPARATOR.$classPath)) {
-				return $dir.DIRECTORY_SEPARATOR.$classPath;
-			}
-		}
-
-		if ($this->useIncludePath && $file = self::resolveIncludePath($classPath)) {
-			return $file;
-		}
-
-		return $this->classMap[$class] = false;
-	}
-
-	private function getClassPath($class) {
-		if (false !== $pos = strrpos($class, '\\')) {
-			// namespaced class name
-			$classPath = str_replace('\\', DIRECTORY_SEPARATOR, substr($class, 0, $pos)).DIRECTORY_SEPARATOR;
-			$className = substr($class, $pos + 1);
-		}
-		else {
-			// PEAR-like class name
-			$classPath = null;
-			$className = $class;
-		}
-
-		$className = str_replace('_', DIRECTORY_SEPARATOR, $className);
-
-		// restore the prefix
-		if ($this->allowUnderscore && DIRECTORY_SEPARATOR === $className[0]) {
-			$className[0] = '_';
-		}
-
-		$classPath .= $className.'.php';
-
-		return $classPath;
-	}
-
-	public static function resolveIncludePath($classPath) {
-		$paths = explode(PATH_SEPARATOR, get_include_path());
-
-		foreach ($paths as $path) {
-			$path = rtrim($path, '/\\');
-
-			if ($file = file_exists($path.DIRECTORY_SEPARATOR.$file)) {
-				return $file;
-			}
-		}
-
-		return false;
-	}
-}
diff --git a/wp-vendor/composer/LICENSE b/wp-vendor/composer/LICENSE
deleted file mode 100644
index 1a28124886..0000000000
--- a/wp-vendor/composer/LICENSE
+++ /dev/null
@@ -1,21 +0,0 @@
-
-Copyright (c) 2016 Nils Adermann, Jordi Boggiano
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is furnished
-to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
-
diff --git a/wp-vendor/composer/autoload_classmap.php b/wp-vendor/composer/autoload_classmap.php
deleted file mode 100644
index 81821314c7..0000000000
--- a/wp-vendor/composer/autoload_classmap.php
+++ /dev/null
@@ -1,184 +0,0 @@
-<?php
-
-// autoload_classmap.php @generated by Composer
-
-$vendorDir = dirname(dirname(__FILE__));
-$baseDir = dirname($vendorDir);
-
-return array(
-    'Automatic_Upgrader_Skin' => $baseDir . '/wp-admin/includes/class-automatic-upgrader-skin.php',
-    'Bulk_Plugin_Upgrader_Skin' => $baseDir . '/wp-admin/includes/class-bulk-plugin-upgrader-skin.php',
-    'Bulk_Theme_Upgrader_Skin' => $baseDir . '/wp-admin/includes/class-bulk-theme-upgrader-skin.php',
-    'Bulk_Upgrader_Skin' => $baseDir . '/wp-admin/includes/class-bulk-upgrader-skin.php',
-    'Core_Upgrader' => $baseDir . '/wp-admin/includes/class-core-upgrader.php',
-    'Custom_Background' => $baseDir . '/wp-admin/custom-background.php',
-    'Custom_Image_Header' => $baseDir . '/wp-admin/custom-header.php',
-    'File_Upload_Upgrader' => $baseDir . '/wp-admin/includes/class-file-upload-upgrader.php',
-    'IXR_Base64' => $baseDir . '/wp-includes/IXR/class-IXR-base64.php',
-    'IXR_Client' => $baseDir . '/wp-includes/IXR/class-IXR-client.php',
-    'IXR_ClientMulticall' => $baseDir . '/wp-includes/IXR/class-IXR-clientmulticall.php',
-    'IXR_Date' => $baseDir . '/wp-includes/IXR/class-IXR-date.php',
-    'IXR_Error' => $baseDir . '/wp-includes/IXR/class-IXR-error.php',
-    'IXR_IntrospectionServer' => $baseDir . '/wp-includes/IXR/class-IXR-introspectionserver.php',
-    'IXR_Message' => $baseDir . '/wp-includes/IXR/class-IXR-message.php',
-    'IXR_Request' => $baseDir . '/wp-includes/IXR/class-IXR-request.php',
-    'IXR_Server' => $baseDir . '/wp-includes/IXR/class-IXR-server.php',
-    'IXR_Value' => $baseDir . '/wp-includes/IXR/class-IXR-value.php',
-    'Language_Pack_Upgrader' => $baseDir . '/wp-admin/includes/class-language-pack-upgrader.php',
-    'Language_Pack_Upgrader_Skin' => $baseDir . '/wp-admin/includes/class-language-pack-upgrader-skin.php',
-    'POP3' => $baseDir . '/wp-includes/class-pop3.php',
-    'PasswordHash' => $baseDir . '/wp-includes/class-phpass.php',
-    'PclZip' => $baseDir . '/wp-admin/includes/class-pclzip.php',
-    'Plugin_Installer_Skin' => $baseDir . '/wp-admin/includes/class-plugin-installer-skin.php',
-    'Plugin_Upgrader' => $baseDir . '/wp-admin/includes/class-plugin-upgrader.php',
-    'Plugin_Upgrader_Skin' => $baseDir . '/wp-admin/includes/class-plugin-upgrader-skin.php',
-    'SMTP' => $baseDir . '/wp-includes/class-smtp.php',
-    'Theme_Installer_Skin' => $baseDir . '/wp-admin/includes/class-theme-installer-skin.php',
-    'Theme_Upgrader' => $baseDir . '/wp-admin/includes/class-theme-upgrader.php',
-    'Theme_Upgrader_Skin' => $baseDir . '/wp-admin/includes/class-theme-upgrader-skin.php',
-    'WP' => $baseDir . '/wp-includes/class-wp.php',
-    'WP_Admin_Bar' => $baseDir . '/wp-includes/class-wp-admin-bar.php',
-    'WP_Ajax_Response' => $baseDir . '/wp-includes/class-wp-ajax-response.php',
-    'WP_Ajax_Upgrader_Skin' => $baseDir . '/wp-admin/includes/class-wp-ajax-upgrader-skin.php',
-    'WP_Automatic_Updater' => $baseDir . '/wp-admin/includes/class-wp-automatic-updater.php',
-    'WP_Comment' => $baseDir . '/wp-includes/class-wp-comment.php',
-    'WP_Comment_Query' => $baseDir . '/wp-includes/class-wp-comment-query.php',
-    'WP_Comments_List_Table' => $baseDir . '/wp-admin/includes/class-wp-comments-list-table.php',
-    'WP_Customize_Background_Image_Control' => $baseDir . '/wp-includes/customize/class-wp-customize-background-image-control.php',
-    'WP_Customize_Background_Image_Setting' => $baseDir . '/wp-includes/customize/class-wp-customize-background-image-setting.php',
-    'WP_Customize_Color_Control' => $baseDir . '/wp-includes/customize/class-wp-customize-color-control.php',
-    'WP_Customize_Control' => $baseDir . '/wp-includes/class-wp-customize-control.php',
-    'WP_Customize_Cropped_Image_Control' => $baseDir . '/wp-includes/customize/class-wp-customize-cropped-image-control.php',
-    'WP_Customize_Filter_Setting' => $baseDir . '/wp-includes/customize/class-wp-customize-filter-setting.php',
-    'WP_Customize_Header_Image_Control' => $baseDir . '/wp-includes/customize/class-wp-customize-header-image-control.php',
-    'WP_Customize_Header_Image_Setting' => $baseDir . '/wp-includes/customize/class-wp-customize-header-image-setting.php',
-    'WP_Customize_Image_Control' => $baseDir . '/wp-includes/customize/class-wp-customize-image-control.php',
-    'WP_Customize_Manager' => $baseDir . '/wp-includes/class-wp-customize-manager.php',
-    'WP_Customize_Media_Control' => $baseDir . '/wp-includes/customize/class-wp-customize-media-control.php',
-    'WP_Customize_Nav_Menu_Auto_Add_Control' => $baseDir . '/wp-includes/customize/class-wp-customize-nav-menu-auto-add-control.php',
-    'WP_Customize_Nav_Menu_Control' => $baseDir . '/wp-includes/customize/class-wp-customize-nav-menu-control.php',
-    'WP_Customize_Nav_Menu_Item_Control' => $baseDir . '/wp-includes/customize/class-wp-customize-nav-menu-item-control.php',
-    'WP_Customize_Nav_Menu_Item_Setting' => $baseDir . '/wp-includes/customize/class-wp-customize-nav-menu-item-setting.php',
-    'WP_Customize_Nav_Menu_Location_Control' => $baseDir . '/wp-includes/customize/class-wp-customize-nav-menu-location-control.php',
-    'WP_Customize_Nav_Menu_Name_Control' => $baseDir . '/wp-includes/customize/class-wp-customize-nav-menu-name-control.php',
-    'WP_Customize_Nav_Menu_Section' => $baseDir . '/wp-includes/customize/class-wp-customize-nav-menu-section.php',
-    'WP_Customize_Nav_Menu_Setting' => $baseDir . '/wp-includes/customize/class-wp-customize-nav-menu-setting.php',
-    'WP_Customize_Nav_Menus' => $baseDir . '/wp-includes/class-wp-customize-nav-menus.php',
-    'WP_Customize_Nav_Menus_Panel' => $baseDir . '/wp-includes/customize/class-wp-customize-nav-menus-panel.php',
-    'WP_Customize_New_Menu_Control' => $baseDir . '/wp-includes/customize/class-wp-customize-new-menu-control.php',
-    'WP_Customize_New_Menu_Section' => $baseDir . '/wp-includes/customize/class-wp-customize-new-menu-section.php',
-    'WP_Customize_Panel' => $baseDir . '/wp-includes/class-wp-customize-panel.php',
-    'WP_Customize_Partial' => $baseDir . '/wp-includes/customize/class-wp-customize-partial.php',
-    'WP_Customize_Section' => $baseDir . '/wp-includes/class-wp-customize-section.php',
-    'WP_Customize_Selective_Refresh' => $baseDir . '/wp-includes/customize/class-wp-customize-selective-refresh.php',
-    'WP_Customize_Setting' => $baseDir . '/wp-includes/class-wp-customize-setting.php',
-    'WP_Customize_Sidebar_Section' => $baseDir . '/wp-includes/customize/class-wp-customize-sidebar-section.php',
-    'WP_Customize_Site_Icon_Control' => $baseDir . '/wp-includes/customize/class-wp-customize-site-icon-control.php',
-    'WP_Customize_Theme_Control' => $baseDir . '/wp-includes/customize/class-wp-customize-theme-control.php',
-    'WP_Customize_Themes_Section' => $baseDir . '/wp-includes/customize/class-wp-customize-themes-section.php',
-    'WP_Customize_Upload_Control' => $baseDir . '/wp-includes/customize/class-wp-customize-upload-control.php',
-    'WP_Customize_Widgets' => $baseDir . '/wp-includes/class-wp-customize-widgets.php',
-    'WP_Date_Query' => $baseDir . '/wp-includes/date.php',
-    'WP_Dependencies' => $baseDir . '/wp-includes/class.wp-dependencies.php',
-    'WP_Embed' => $baseDir . '/wp-includes/class-wp-embed.php',
-    'WP_Error' => $baseDir . '/wp-includes/class-wp-error.php',
-    'WP_Feed_Cache' => $baseDir . '/wp-includes/class-wp-feed-cache.php',
-    'WP_Feed_Cache_Transient' => $baseDir . '/wp-includes/class-wp-feed-cache-transient.php',
-    'WP_Filesystem_Base' => $baseDir . '/wp-admin/includes/class-wp-filesystem-base.php',
-    'WP_Filesystem_Direct' => $baseDir . '/wp-admin/includes/class-wp-filesystem-direct.php',
-    'WP_Filesystem_FTPext' => $baseDir . '/wp-admin/includes/class-wp-filesystem-ftpext.php',
-    'WP_Filesystem_SSH2' => $baseDir . '/wp-admin/includes/class-wp-filesystem-ssh2.php',
-    'WP_Filesystem_ftpsockets' => $baseDir . '/wp-admin/includes/class-wp-filesystem-ftpsockets.php',
-    'WP_HTTP_Fsockopen' => $baseDir . '/wp-includes/class-wp-http-streams.php',
-    'WP_HTTP_IXR_Client' => $baseDir . '/wp-includes/class-wp-http-ixr-client.php',
-    'WP_HTTP_Proxy' => $baseDir . '/wp-includes/class-wp-http-proxy.php',
-    'WP_HTTP_Requests_Response' => $baseDir . '/wp-includes/class-wp-http-requests-response.php',
-    'WP_HTTP_Response' => $baseDir . '/wp-includes/class-wp-http-response.php',
-    'WP_Http' => $baseDir . '/wp-includes/class-http.php',
-    'WP_Http_Cookie' => $baseDir . '/wp-includes/class-wp-http-cookie.php',
-    'WP_Http_Curl' => $baseDir . '/wp-includes/class-wp-http-curl.php',
-    'WP_Http_Encoding' => $baseDir . '/wp-includes/class-wp-http-encoding.php',
-    'WP_Http_Streams' => $baseDir . '/wp-includes/class-wp-http-streams.php',
-    'WP_Image_Editor' => $baseDir . '/wp-includes/class-wp-image-editor.php',
-    'WP_Image_Editor_GD' => $baseDir . '/wp-includes/class-wp-image-editor-gd.php',
-    'WP_Image_Editor_Imagick' => $baseDir . '/wp-includes/class-wp-image-editor-imagick.php',
-    'WP_Importer' => $baseDir . '/wp-admin/includes/class-wp-importer.php',
-    'WP_Internal_Pointers' => $baseDir . '/wp-admin/includes/class-wp-internal-pointers.php',
-    'WP_Links_List_Table' => $baseDir . '/wp-admin/includes/class-wp-links-list-table.php',
-    'WP_List_Table' => $baseDir . '/wp-admin/includes/class-wp-list-table.php',
-    'WP_Locale' => $baseDir . '/wp-includes/class-wp-locale.php',
-    'WP_MS_Sites_List_Table' => $baseDir . '/wp-admin/includes/class-wp-ms-sites-list-table.php',
-    'WP_MS_Themes_List_Table' => $baseDir . '/wp-admin/includes/class-wp-ms-themes-list-table.php',
-    'WP_MS_Users_List_Table' => $baseDir . '/wp-admin/includes/class-wp-ms-users-list-table.php',
-    'WP_MatchesMapRegex' => $baseDir . '/wp-includes/class-wp-matchesmapregex.php',
-    'WP_Media_List_Table' => $baseDir . '/wp-admin/includes/class-wp-media-list-table.php',
-    'WP_Meta_Query' => $baseDir . '/wp-includes/class-wp-meta-query.php',
-    'WP_Metadata_Lazyloader' => $baseDir . '/wp-includes/class-wp-metadata-lazyloader.php',
-    'WP_Network' => $baseDir . '/wp-includes/class-wp-network.php',
-    'WP_Network_Query' => $baseDir . '/wp-includes/class-wp-network-query.php',
-    'WP_Plugin_Install_List_Table' => $baseDir . '/wp-admin/includes/class-wp-plugin-install-list-table.php',
-    'WP_Plugins_List_Table' => $baseDir . '/wp-admin/includes/class-wp-plugins-list-table.php',
-    'WP_Post' => $baseDir . '/wp-includes/class-wp-post.php',
-    'WP_Post_Comments_List_Table' => $baseDir . '/wp-admin/includes/class-wp-post-comments-list-table.php',
-    'WP_Post_Type' => $baseDir . '/wp-includes/class-wp-post-type.php',
-    'WP_Posts_List_Table' => $baseDir . '/wp-admin/includes/class-wp-posts-list-table.php',
-    'WP_Press_This' => $baseDir . '/wp-admin/includes/class-wp-press-this.php',
-    'WP_Query' => $baseDir . '/wp-includes/class-wp-query.php',
-    'WP_REST_Request' => $baseDir . '/wp-includes/rest-api/class-wp-rest-request.php',
-    'WP_REST_Response' => $baseDir . '/wp-includes/rest-api/class-wp-rest-response.php',
-    'WP_REST_Server' => $baseDir . '/wp-includes/rest-api/class-wp-rest-server.php',
-    'WP_Rewrite' => $baseDir . '/wp-includes/class-wp-rewrite.php',
-    'WP_Role' => $baseDir . '/wp-includes/class-wp-role.php',
-    'WP_Roles' => $baseDir . '/wp-includes/class-wp-roles.php',
-    'WP_Screen' => $baseDir . '/wp-admin/includes/class-wp-screen.php',
-    'WP_Scripts' => $baseDir . '/wp-includes/class.wp-scripts.php',
-    'WP_Session_Tokens' => $baseDir . '/wp-includes/class-wp-session-tokens.php',
-    'WP_SimplePie_File' => $baseDir . '/wp-includes/class-wp-simplepie-file.php',
-    'WP_SimplePie_Sanitize_KSES' => $baseDir . '/wp-includes/class-wp-simplepie-sanitize-kses.php',
-    'WP_Site' => $baseDir . '/wp-includes/class-wp-site.php',
-    'WP_Site_Icon' => $baseDir . '/wp-admin/includes/class-wp-site-icon.php',
-    'WP_Site_Query' => $baseDir . '/wp-includes/class-wp-site-query.php',
-    'WP_Styles' => $baseDir . '/wp-includes/class.wp-styles.php',
-    'WP_Tax_Query' => $baseDir . '/wp-includes/class-wp-tax-query.php',
-    'WP_Term' => $baseDir . '/wp-includes/class-wp-term.php',
-    'WP_Term_Query' => $baseDir . '/wp-includes/class-wp-term-query.php',
-    'WP_Terms_List_Table' => $baseDir . '/wp-admin/includes/class-wp-terms-list-table.php',
-    'WP_Text_Diff_Renderer_Table' => $baseDir . '/wp-includes/class-wp-text-diff-renderer-table.php',
-    'WP_Text_Diff_Renderer_inline' => $baseDir . '/wp-includes/class-wp-text-diff-renderer-inline.php',
-    'WP_Theme' => $baseDir . '/wp-includes/class-wp-theme.php',
-    'WP_Theme_Install_List_Table' => $baseDir . '/wp-admin/includes/class-wp-theme-install-list-table.php',
-    'WP_Themes_List_Table' => $baseDir . '/wp-admin/includes/class-wp-themes-list-table.php',
-    'WP_Upgrader' => $baseDir . '/wp-admin/includes/class-wp-upgrader.php',
-    'WP_Upgrader_Skin' => $baseDir . '/wp-admin/includes/class-wp-upgrader-skin.php',
-    'WP_User' => $baseDir . '/wp-includes/class-wp-user.php',
-    'WP_User_Meta_Session_Tokens' => $baseDir . '/wp-includes/class-wp-user-meta-session-tokens.php',
-    'WP_User_Query' => $baseDir . '/wp-includes/class-wp-user-query.php',
-    'WP_Users_List_Table' => $baseDir . '/wp-admin/includes/class-wp-users-list-table.php',
-    'WP_Widget' => $baseDir . '/wp-includes/class-wp-widget.php',
-    'WP_Widget_Area_Customize_Control' => $baseDir . '/wp-includes/customize/class-wp-widget-area-customize-control.php',
-    'WP_Widget_Factory' => $baseDir . '/wp-includes/class-wp-widget-factory.php',
-    'WP_Widget_Form_Customize_Control' => $baseDir . '/wp-includes/customize/class-wp-widget-form-customize-control.php',
-    'WP_oEmbed' => $baseDir . '/wp-includes/class-oembed.php',
-    'WP_oEmbed_Controller' => $baseDir . '/wp-includes/class-wp-oembed-controller.php',
-    'Walker' => $baseDir . '/wp-includes/class-wp-walker.php',
-    'Walker_Category' => $baseDir . '/wp-includes/class-walker-category.php',
-    'Walker_CategoryDropdown' => $baseDir . '/wp-includes/class-walker-category-dropdown.php',
-    'Walker_Category_Checklist' => $baseDir . '/wp-admin/includes/class-walker-category-checklist.php',
-    'Walker_Comment' => $baseDir . '/wp-includes/class-walker-comment.php',
-    'Walker_Nav_Menu' => $baseDir . '/wp-includes/class-walker-nav-menu.php',
-    'Walker_Nav_Menu_Checklist' => $baseDir . '/wp-admin/includes/class-walker-nav-menu-checklist.php',
-    'Walker_Nav_Menu_Edit' => $baseDir . '/wp-admin/includes/class-walker-nav-menu-edit.php',
-    'Walker_Page' => $baseDir . '/wp-includes/class-walker-page.php',
-    'Walker_PageDropdown' => $baseDir . '/wp-includes/class-walker-page-dropdown.php',
-    '_WP_Dependency' => $baseDir . '/wp-includes/class-wp-dependency.php',
-    '_WP_Editors' => $baseDir . '/wp-includes/class-wp-editor.php',
-    '_WP_List_Table_Compat' => $baseDir . '/wp-admin/includes/class-wp-list-table-compat.php',
-    'ftp' => $baseDir . '/wp-admin/includes/class-ftp.php',
-    'ftp_base' => $baseDir . '/wp-admin/includes/class-ftp.php',
-    'ftp_pure' => $baseDir . '/wp-admin/includes/class-ftp-pure.php',
-    'ftp_sockets' => $baseDir . '/wp-admin/includes/class-ftp-sockets.php',
-    'wp_xmlrpc_server' => $baseDir . '/wp-includes/class-wp-xmlrpc-server.php',
-    'wpdb' => $baseDir . '/wp-includes/wp-db.php',
-    'xrstf\\Composer52\\AutoloadGenerator' => $vendorDir . '/xrstf/composer-php52/lib/xrstf/Composer52/AutoloadGenerator.php',
-    'xrstf\\Composer52\\Generator' => $vendorDir . '/xrstf/composer-php52/lib/xrstf/Composer52/Generator.php',
-);
diff --git a/wp-vendor/composer/autoload_namespaces.php b/wp-vendor/composer/autoload_namespaces.php
deleted file mode 100644
index 420e846722..0000000000
--- a/wp-vendor/composer/autoload_namespaces.php
+++ /dev/null
@@ -1,10 +0,0 @@
-<?php
-
-// autoload_namespaces.php @generated by Composer
-
-$vendorDir = dirname(dirname(__FILE__));
-$baseDir = dirname($vendorDir);
-
-return array(
-    'xrstf\\Composer52' => array($vendorDir . '/xrstf/composer-php52/lib'),
-);
diff --git a/wp-vendor/composer/autoload_psr4.php b/wp-vendor/composer/autoload_psr4.php
deleted file mode 100644
index b265c64a22..0000000000
--- a/wp-vendor/composer/autoload_psr4.php
+++ /dev/null
@@ -1,9 +0,0 @@
-<?php
-
-// autoload_psr4.php @generated by Composer
-
-$vendorDir = dirname(dirname(__FILE__));
-$baseDir = dirname($vendorDir);
-
-return array(
-);
diff --git a/wp-vendor/composer/autoload_real_52.php b/wp-vendor/composer/autoload_real_52.php
deleted file mode 100644
index ad4febce89..0000000000
--- a/wp-vendor/composer/autoload_real_52.php
+++ /dev/null
@@ -1,44 +0,0 @@
-<?php
-
-// autoload_real_52.php generated by xrstf/composer-php52
-
-class ComposerAutoloaderInit84e65be829c2294b794a94e0a8b5807c {
-	private static $loader;
-
-	public static function loadClassLoader($class) {
-		if ('xrstf_Composer52_ClassLoader' === $class) {
-			require dirname(__FILE__).'/ClassLoader52.php';
-		}
-	}
-
-	/**
-	 * @return xrstf_Composer52_ClassLoader
-	 */
-	public static function getLoader() {
-		if (null !== self::$loader) {
-			return self::$loader;
-		}
-
-		spl_autoload_register(array('ComposerAutoloaderInit84e65be829c2294b794a94e0a8b5807c', 'loadClassLoader'), true /*, true */);
-		self::$loader = $loader = new xrstf_Composer52_ClassLoader();
-		spl_autoload_unregister(array('ComposerAutoloaderInit84e65be829c2294b794a94e0a8b5807c', 'loadClassLoader'));
-
-		$vendorDir = dirname(dirname(__FILE__));
-		$baseDir   = dirname($vendorDir);
-		$dir       = dirname(__FILE__);
-
-		$map = require $dir.'/autoload_namespaces.php';
-		foreach ($map as $namespace => $path) {
-			$loader->add($namespace, $path);
-		}
-
-		$classMap = require $dir.'/autoload_classmap.php';
-		if ($classMap) {
-			$loader->addClassMap($classMap);
-		}
-
-		$loader->register(true);
-
-		return $loader;
-	}
-}
diff --git a/wp-vendor/composer/installed.json b/wp-vendor/composer/installed.json
deleted file mode 100644
index fa402a990a..0000000000
--- a/wp-vendor/composer/installed.json
+++ /dev/null
@@ -1,35 +0,0 @@
-[
-    {
-        "name": "xrstf/composer-php52",
-        "version": "v1.0.20",
-        "version_normalized": "1.0.20.0",
-        "source": {
-            "type": "git",
-            "url": "https://github.com/composer-php52/composer-php52.git",
-            "reference": "bd41459d5e27df8d33057842b32377c39e97a5a8"
-        },
-        "dist": {
-            "type": "zip",
-            "url": "https://api.github.com/repos/composer-php52/composer-php52/zipball/bd41459d5e27df8d33057842b32377c39e97a5a8",
-            "reference": "bd41459d5e27df8d33057842b32377c39e97a5a8",
-            "shasum": ""
-        },
-        "time": "2016-04-16 21:52:24",
-        "type": "library",
-        "extra": {
-            "branch-alias": {
-                "dev-default": "1.x-dev"
-            }
-        },
-        "installation-source": "dist",
-        "autoload": {
-            "psr-0": {
-                "xrstf\\Composer52": "lib/"
-            }
-        },
-        "notification-url": "https://packagist.org/downloads/",
-        "license": [
-            "MIT"
-        ]
-    }
-]
diff --git a/wp-vendor/xrstf/composer-php52/LICENSE b/wp-vendor/xrstf/composer-php52/LICENSE
deleted file mode 100644
index 0e81028e90..0000000000
--- a/wp-vendor/xrstf/composer-php52/LICENSE
+++ /dev/null
@@ -1,19 +0,0 @@
-Copyright (c) 2013 Christoph Mewes
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is furnished
-to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
diff --git a/wp-vendor/xrstf/composer-php52/README.md b/wp-vendor/xrstf/composer-php52/README.md
deleted file mode 100644
index e0b6cdac04..0000000000
--- a/wp-vendor/xrstf/composer-php52/README.md
+++ /dev/null
@@ -1,37 +0,0 @@
-PHP 5.2 Autoloading for Composer
-================================
-
-This package provides an easy way to get a PHP 5.2 compatible autoloader out of Composer. The generated autoloader is fully compatible to the original and is written into separate files, each ending with `_52.php`.
-
-Legacy
-------
-
-Please do not use this, if you can avoid it. It's a horrible hack, often breaks and is extremely tied to Composer's interna. This package was originally developed in 2012, when PHP 5.2 was much more common on cheap webhosts.
-
-In 2016, this package has been moved from Bitbucket to a Github organization, because the original developer could no longer reliably maintain it. This is the reason for this legacy package name ``xrstf/...``.
-
-Usage
------
-
-In your project's `composer.json`, add the following lines:
-
-```json
-{
-    "require": {
-        "xrstf/composer-php52": "1.*"
-    },
-    "scripts": {
-        "post-install-cmd": [
-            "xrstf\\Composer52\\Generator::onPostInstallCmd"
-        ],
-        "post-update-cmd": [
-            "xrstf\\Composer52\\Generator::onPostInstallCmd"
-        ],
-        "post-autoload-dump": [
-            "xrstf\\Composer52\\Generator::onPostInstallCmd"
-        ]
-    }
-}
-```
-
-After the next update/install, you will have a `vendor/autoload_52.php` file, that you can simply include and use in PHP 5.2 projects.
diff --git a/wp-vendor/xrstf/composer-php52/composer.json b/wp-vendor/xrstf/composer-php52/composer.json
deleted file mode 100644
index c6d6a9e51a..0000000000
--- a/wp-vendor/xrstf/composer-php52/composer.json
+++ /dev/null
@@ -1,26 +0,0 @@
-{
-    "name": "xrstf/composer-php52",
-    "license": "MIT",
-    "support": {
-        "source": "https://github.com/composer-php52/composer-php52",
-        "issues": "https://github.com/composer-php52/composer-php52/issues"
-    },
-    "autoload": {
-        "psr-0": {
-            "xrstf\\Composer52": "lib/"
-        }
-    },
-    "scripts": {
-        "post-install-cmd": [
-            "xrstf\\Composer52\\Generator::onPostInstallCmd"
-        ],
-        "post-update-cmd": [
-            "xrstf\\Composer52\\Generator::onPostInstallCmd"
-        ]
-    },
-    "extra": {
-        "branch-alias": {
-            "dev-default": "1.x-dev"
-        }
-    }
-}
diff --git a/wp-vendor/xrstf/composer-php52/lib/xrstf/Composer52/AutoloadGenerator.php b/wp-vendor/xrstf/composer-php52/lib/xrstf/Composer52/AutoloadGenerator.php
deleted file mode 100644
index 2e93e6f320..0000000000
--- a/wp-vendor/xrstf/composer-php52/lib/xrstf/Composer52/AutoloadGenerator.php
+++ /dev/null
@@ -1,346 +0,0 @@
-<?php
-/*
- * Copyright (c) 2013, Christoph Mewes, http://www.xrstf.de
- *
- * This file is released under the terms of the MIT license. You can find the
- * complete text in the attached LICENSE file or online at:
- *
- * http://www.opensource.org/licenses/mit-license.php
- *
- * --------------------------------------------------------------------------
- *
- * 99% of this is copied as-is from the original Composer source code and is
- * released under MIT license as well. Copyright goes to:
- *
- * - Igor Wiedler <igor@wiedler.ch>
- * - Jordi Boggiano <j.boggiano@seld.be>
- */
-
-namespace xrstf\Composer52;
-
-use Composer\Autoload\AutoloadGenerator as BaseGenerator;
-use Composer\Autoload\ClassMapGenerator;
-use Composer\Config;
-use Composer\Installer\InstallationManager;
-use Composer\Package\AliasPackage;
-use Composer\Package\PackageInterface;
-use Composer\Repository\InstalledRepositoryInterface;
-use Composer\Util\Filesystem;
-
-class AutoloadGenerator extends BaseGenerator {
-
-	/**
-	 * @var bool
-	 */
-	private $classMapAuthoritative = false;
-
-	public function __construct() {
-		// do nothing (but keep this constructor so we can build an instance without the need for an event dispatcher)
-	}
-
-	/**
-	 * Whether or not generated autoloader considers the class map
-	 * authoritative.
-	 *
-	 * @param bool $classMapAuthoritative
-	 */
-	public function setClassMapAuthoritative($classMapAuthoritative)
-	{
-		$this->classMapAuthoritative = (boolean) $classMapAuthoritative;
-	}
-
-	public function dump(Config $config, InstalledRepositoryInterface $localRepo, PackageInterface $mainPackage, InstallationManager $installationManager, $targetDir, $scanPsr0Packages = false, $suffix = '') {
-		if ($this->classMapAuthoritative) {
-			// Force scanPsr0Packages when classmap is authoritative
-			$scanPsr0Packages = true;
-		}
-
-		$filesystem = new Filesystem();
-		$filesystem->ensureDirectoryExists($config->get('vendor-dir'));
-
-		$cwd        = getcwd();
-		$basePath   = $filesystem->normalizePath($cwd);
-		$vendorPath = $filesystem->normalizePath(realpath($config->get('vendor-dir')));
-		$targetDir  = $vendorPath.'/'.$targetDir;
-		$filesystem->ensureDirectoryExists($targetDir);
-
-		$useGlobalIncludePath  = (bool) $config->get('use-include-path');
-		$prependAutoloader     = $config->get('prepend-autoloader') === false ? 'false' : 'true';
-		$classMapAuthoritative = $config->get('classmap-authoritative');
-
-		$vendorPathCode            = $filesystem->findShortestPathCode(realpath($targetDir), $vendorPath, true);
-		$vendorPathToTargetDirCode = $filesystem->findShortestPathCode($vendorPath, realpath($targetDir), true);
-
-		$appBaseDirCode = $filesystem->findShortestPathCode($vendorPath, $basePath, true);
-		$appBaseDirCode = str_replace('__DIR__', '$vendorDir', $appBaseDirCode);
-
-		// add 5.2 compat
-		$vendorPathCode            = str_replace('__DIR__', 'dirname(__FILE__)', $vendorPathCode);
-		$vendorPathToTargetDirCode = str_replace('__DIR__', 'dirname(__FILE__)', $vendorPathToTargetDirCode);
-
-		$packageMap = $this->buildPackageMap($installationManager, $mainPackage, $localRepo->getCanonicalPackages());
-		$autoloads = $this->parseAutoloads($packageMap, $mainPackage);
-
-		// add custom psr-0 autoloading if the root package has a target dir
-		$targetDirLoader = null;
-		$mainAutoload = $mainPackage->getAutoload();
-		if ($mainPackage->getTargetDir() && !empty($mainAutoload['psr-0'])) {
-			$levels   = count(explode('/', $filesystem->normalizePath($mainPackage->getTargetDir())));
-			$prefixes = implode(', ', array_map(function ($prefix) {
-				return var_export($prefix, true);
-			}, array_keys($mainAutoload['psr-0'])));
-
-			$baseDirFromTargetDirCode = $filesystem->findShortestPathCode($targetDir, $basePath, true);
-
-			$targetDirLoader = <<<EOF
-
-	public static function autoload(\$class) {
-		\$dir      = $baseDirFromTargetDirCode.'/';
-		\$prefixes = array($prefixes);
-
-		foreach (\$prefixes as \$prefix) {
-			if (0 !== strpos(\$class, \$prefix)) {
-				continue;
-			}
-
-			\$path = explode(DIRECTORY_SEPARATOR, self::getClassPath(\$class));
-			\$path = \$dir.implode('/', array_slice(\$path, $levels));
-
-			if (!\$path = self::resolveIncludePath(\$path)) {
-				return false;
-			}
-
-			require \$path;
-			return true;
-		}
-	}
-
-EOF;
-		}
-
-		$filesCode = "";
-		$autoloads['files'] = new \RecursiveIteratorIterator(new \RecursiveArrayIterator($autoloads['files']));
-		foreach ($autoloads['files'] as $functionFile) {
-			// don't include file if it is using PHP 5.3+ syntax
-			// https://bitbucket.org/xrstf/composer-php52/issue/4
-			if ($this->isPHP53($functionFile)) {
-				$filesCode .= '//		require '.$this->getPathCode($filesystem, $basePath, $vendorPath, $functionFile)."; // disabled because of PHP 5.3 syntax\n";
-			}
-			else {
-				$filesCode .= '		require '.$this->getPathCode($filesystem, $basePath, $vendorPath, $functionFile).";\n";
-			}
-		}
-
-		if (!$suffix) {
-			$suffix = md5(uniqid('', true));
-		}
-
-		$includePathFile = $this->getIncludePathsFile($packageMap, $filesystem, $basePath, $vendorPath, $vendorPathCode, $appBaseDirCode);
-
-		file_put_contents($vendorPath.'/autoload_52.php', $this->getAutoloadFile($vendorPathToTargetDirCode, $suffix));
-		file_put_contents($targetDir.'/autoload_real_52.php', $this->getAutoloadRealFile(true, (bool) $includePathFile, $targetDirLoader, $filesCode, $vendorPathCode, $appBaseDirCode, $suffix, $useGlobalIncludePath, $prependAutoloader));
-
-		// use stream_copy_to_stream instead of copy
-		// to work around https://bugs.php.net/bug.php?id=64634
-		$sourceLoader = fopen(__DIR__.'/ClassLoader.php', 'r');
-		$targetLoader = fopen($targetDir.'/ClassLoader52.php', 'w+');
-		stream_copy_to_stream($sourceLoader, $targetLoader);
-		fclose($sourceLoader);
-		fclose($targetLoader);
-		unset($sourceLoader, $targetLoader);
-	}
-
-	protected function isPHP53($file) {
-		$tokens = token_get_all(file_get_contents($file));
-		$php53  = array(T_DIR, T_GOTO, T_NAMESPACE, T_NS_C, T_NS_SEPARATOR, T_USE);
-
-		// PHP 5.4+
-		if (defined('T_TRAIT')) {
-			$php53[] = T_TRAIT;
-			$php53[] = T_TRAIT_C;
-			$php53[] = T_TRAIT_C;
-		}
-
-		// PHP 5.5+
-		if (defined('T_FINALLY')) {
-			$php53[] = T_FINALLY;
-			$php53[] = T_YIELD;
-		}
-
-		foreach ($tokens as $token) {
-			if (is_array($token) && in_array($token[0], $php53)) {
-				return true;
-			}
-		}
-
-		return false;
-	}
-
-	protected function getIncludePathsFile(array $packageMap, Filesystem $filesystem, $basePath, $vendorPath, $vendorPathCode, $appBaseDirCode) {
-		$includePaths = array();
-
-		foreach ($packageMap as $item) {
-			list($package, $installPath) = $item;
-
-			if (null !== $package->getTargetDir() && strlen($package->getTargetDir()) > 0) {
-				$installPath = substr($installPath, 0, -strlen('/'.$package->getTargetDir()));
-			}
-
-			foreach ($package->getIncludePaths() as $includePath) {
-				$includePath = trim($includePath, '/');
-				$includePaths[] = empty($installPath) ? $includePath : $installPath.'/'.$includePath;
-			}
-		}
-
-		if (!$includePaths) {
-			return;
-		}
-
-		$includePathsFile = <<<EOF
-<?php
-
-// include_paths_52.php generated by xrstf/composer-php52
-
-\$vendorDir = $vendorPathCode;
-\$baseDir = $appBaseDirCode;
-
-return array(
-
-EOF;
-
-		foreach ($includePaths as $path) {
-			$includePathsFile .= "\t" . $this->getPathCode($filesystem, $basePath, $vendorPath, $path) . ",\n";
-		}
-
-		return $includePathsFile . ");\n";
-	}
-
-	protected function getAutoloadFile($vendorPathToTargetDirCode, $suffix) {
-		return <<<AUTOLOAD
-<?php
-
-// autoload_52.php generated by xrstf/composer-php52
-
-require_once $vendorPathToTargetDirCode.'/autoload_real_52.php';
-
-return ComposerAutoloaderInit$suffix::getLoader();
-
-AUTOLOAD;
-	}
-
-	protected function getAutoloadRealFile($useClassMap, $useIncludePath, $targetDirLoader, $filesCode, $vendorPathCode, $appBaseDirCode, $suffix, $useGlobalIncludePath, $prependAutoloader, $staticPhpVersion = 70000) {
-		// TODO the class ComposerAutoloaderInit should be revert to a closure
-		// when APC has been fixed:
-		// - https://github.com/composer/composer/issues/959
-		// - https://bugs.php.net/bug.php?id=52144
-		// - https://bugs.php.net/bug.php?id=61576
-		// - https://bugs.php.net/bug.php?id=59298
-
-		if ($filesCode) {
-				$filesCode = "\n\n".rtrim($filesCode);
-		}
-
-		$file = <<<HEADER
-<?php
-
-// autoload_real_52.php generated by xrstf/composer-php52
-
-class ComposerAutoloaderInit$suffix {
-	private static \$loader;
-
-	public static function loadClassLoader(\$class) {
-		if ('xrstf_Composer52_ClassLoader' === \$class) {
-			require dirname(__FILE__).'/ClassLoader52.php';
-		}
-	}
-
-	/**
-	 * @return xrstf_Composer52_ClassLoader
-	 */
-	public static function getLoader() {
-		if (null !== self::\$loader) {
-			return self::\$loader;
-		}
-
-		spl_autoload_register(array('ComposerAutoloaderInit$suffix', 'loadClassLoader'), true /*, true */);
-		self::\$loader = \$loader = new xrstf_Composer52_ClassLoader();
-		spl_autoload_unregister(array('ComposerAutoloaderInit$suffix', 'loadClassLoader'));
-
-		\$vendorDir = $vendorPathCode;
-		\$baseDir   = $appBaseDirCode;
-		\$dir       = dirname(__FILE__);
-
-
-HEADER;
-
-		if ($useIncludePath) {
-			$file .= <<<'INCLUDE_PATH'
-		$includePaths = require $dir.'/include_paths.php';
-		array_push($includePaths, get_include_path());
-		set_include_path(implode(PATH_SEPARATOR, $includePaths));
-
-
-INCLUDE_PATH;
-		}
-
-		$file .= <<<'PSR0'
-		$map = require $dir.'/autoload_namespaces.php';
-		foreach ($map as $namespace => $path) {
-			$loader->add($namespace, $path);
-		}
-
-
-PSR0;
-
-		if ($useClassMap) {
-			$file .= <<<'CLASSMAP'
-		$classMap = require $dir.'/autoload_classmap.php';
-		if ($classMap) {
-			$loader->addClassMap($classMap);
-		}
-
-
-CLASSMAP;
-		}
-
-		if ($this->classMapAuthoritative) {
-			$file .= <<<'CLASSMAPAUTHORITATIVE'
-		$loader->setClassMapAuthoritative(true);
-
-CLASSMAPAUTHORITATIVE;
-		}
-
-		if ($useGlobalIncludePath) {
-			$file .= <<<'INCLUDEPATH'
-		$loader->setUseIncludePath(true);
-
-
-INCLUDEPATH;
-		}
-
-		if ($targetDirLoader) {
-			$file .= <<<REGISTER_AUTOLOAD
-		spl_autoload_register(array('ComposerAutoloaderInit$suffix', 'autoload'), true);
-
-
-REGISTER_AUTOLOAD;
-
-		}
-
-		$file .= <<<METHOD_FOOTER
-		\$loader->register($prependAutoloader);{$filesCode}
-
-		return \$loader;
-	}
-
-METHOD_FOOTER;
-
-		$file .= $targetDirLoader;
-
-		return $file . <<<FOOTER
-}
-
-FOOTER;
-
-	}
-}
diff --git a/wp-vendor/xrstf/composer-php52/lib/xrstf/Composer52/ClassLoader.php b/wp-vendor/xrstf/composer-php52/lib/xrstf/Composer52/ClassLoader.php
deleted file mode 100644
index d721c7e76b..0000000000
--- a/wp-vendor/xrstf/composer-php52/lib/xrstf/Composer52/ClassLoader.php
+++ /dev/null
@@ -1,271 +0,0 @@
-<?php
-/*
- * Copyright (c) 2013, Christoph Mewes, http://www.xrstf.de
- *
- * This file is released under the terms of the MIT license. You can find the
- * complete text in the attached LICENSE file or online at:
- *
- * http://www.opensource.org/licenses/mit-license.php
- *
- * --------------------------------------------------------------------------
- *
- * 99% of this is copied as-is from the original Composer source code and is
- * released under MIT license as well. Copyright goes to:
- *
- * - Fabien Potencier <fabien@symfony.com>
- * - Jordi Boggiano <j.boggiano@seld.be>
- */
-
-class xrstf_Composer52_ClassLoader {
-	private $prefixes              = array();
-	private $fallbackDirs          = array();
-	private $useIncludePath        = false;
-	private $classMap              = array();
-	private $classMapAuthoratative = false;
-	private $allowUnderscore       = false;
-
-	/**
-	 * @param boolean $flag  true to allow class names with a leading underscore, false to disable
-	 */
-	public function setAllowUnderscore($flag) {
-		$this->allowUnderscore = (boolean) $flag;
-	}
-
-	/**
-	 * @return array
-	 */
-	public function getPrefixes() {
-		return $this->prefixes;
-	}
-
-	/**
-	 * Turns off searching the prefix and fallback directories for classes
-	 * that have not been registered with the class map.
-	 *
-	 * @param bool $classMapAuthoratative
-	 */
-	public function setClassMapAuthoritative($classMapAuthoratative) {
-		$this->classMapAuthoratative = $classMapAuthoratative;
-	}
-
-	/**
-	 * Should class lookup fail if not found in the current class map?
-	 *
-	 * @return bool
-	 */
-	public function getClassMapAuthoratative() {
-		return $this->classMapAuthoratative;
-	}
-
-	/**
-	 * @return array
-	 */
-	public function getFallbackDirs() {
-		return $this->fallbackDirs;
-	}
-
-	/**
-	 * @return array
-	 */
-	public function getClassMap() {
-		return $this->classMap;
-	}
-
-	/**
-	 * @param array $classMap  class to filename map
-	 */
-	public function addClassMap(array $classMap) {
-		if ($this->classMap) {
-			$this->classMap = array_merge($this->classMap, $classMap);
-		}
-		else {
-			$this->classMap = $classMap;
-		}
-	}
-
-	/**
-	 * Registers a set of classes, merging with any others previously set.
-	 *
-	 * @param string       $prefix   the classes prefix
-	 * @param array|string $paths    the location(s) of the classes
-	 * @param bool         $prepend  prepend the location(s)
-	 */
-	public function add($prefix, $paths, $prepend = false) {
-		if (!$prefix) {
-			if ($prepend) {
-				$this->fallbackDirs = array_merge(
-					(array) $paths,
-					$this->fallbackDirs
-				);
-			}
-			else {
-				$this->fallbackDirs = array_merge(
-					$this->fallbackDirs,
-					(array) $paths
-				);
-			}
-
-			return;
-		}
-
-		if (!isset($this->prefixes[$prefix])) {
-			$this->prefixes[$prefix] = (array) $paths;
-			return;
-		}
-
-		if ($prepend) {
-			$this->prefixes[$prefix] = array_merge(
-				(array) $paths,
-				$this->prefixes[$prefix]
-			);
-		}
-		else {
-			$this->prefixes[$prefix] = array_merge(
-				$this->prefixes[$prefix],
-				(array) $paths
-			);
-		}
-	}
-
-	/**
-	 * Registers a set of classes, replacing any others previously set.
-	 *
-	 * @param string       $prefix  the classes prefix
-	 * @param array|string $paths   the location(s) of the classes
-	 */
-	public function set($prefix, $paths) {
-		if (!$prefix) {
-			$this->fallbackDirs = (array) $paths;
-			return;
-		}
-
-		$this->prefixes[$prefix] = (array) $paths;
-	}
-
-	/**
-	 * Turns on searching the include path for class files.
-	 *
-	 * @param bool $useIncludePath
-	 */
-	public function setUseIncludePath($useIncludePath) {
-		$this->useIncludePath = $useIncludePath;
-	}
-
-	/**
-	 * Can be used to check if the autoloader uses the include path to check
-	 * for classes.
-	 *
-	 * @return bool
-	 */
-	public function getUseIncludePath() {
-		return $this->useIncludePath;
-	}
-
-	/**
-	 * Registers this instance as an autoloader.
-	 */
-	public function register() {
-		spl_autoload_register(array($this, 'loadClass'), true);
-	}
-
-	/**
-	 * Unregisters this instance as an autoloader.
-	 */
-	public function unregister() {
-		spl_autoload_unregister(array($this, 'loadClass'));
-	}
-
-	/**
-	 * Loads the given class or interface.
-	 *
-	 * @param  string $class  the name of the class
-	 * @return bool|null      true, if loaded
-	 */
-	public function loadClass($class) {
-		if ($file = $this->findFile($class)) {
-			include $file;
-			return true;
-		}
-	}
-
-	/**
-	 * Finds the path to the file where the class is defined.
-	 *
-	 * @param  string $class  the name of the class
-	 * @return string|null    the path, if found
-	 */
-	public function findFile($class) {
-		if ('\\' === $class[0]) {
-			$class = substr($class, 1);
-		}
-
-		if (isset($this->classMap[$class])) {
-			return $this->classMap[$class];
-		}
-		elseif ($this->classMapAuthoratative) {
-			return false;
-		}
-
-		$classPath = $this->getClassPath($class);
-
-		foreach ($this->prefixes as $prefix => $dirs) {
-			if (0 === strpos($class, $prefix)) {
-				foreach ($dirs as $dir) {
-					if (file_exists($dir.DIRECTORY_SEPARATOR.$classPath)) {
-						return $dir.DIRECTORY_SEPARATOR.$classPath;
-					}
-				}
-			}
-		}
-
-		foreach ($this->fallbackDirs as $dir) {
-			if (file_exists($dir.DIRECTORY_SEPARATOR.$classPath)) {
-				return $dir.DIRECTORY_SEPARATOR.$classPath;
-			}
-		}
-
-		if ($this->useIncludePath && $file = self::resolveIncludePath($classPath)) {
-			return $file;
-		}
-
-		return $this->classMap[$class] = false;
-	}
-
-	private function getClassPath($class) {
-		if (false !== $pos = strrpos($class, '\\')) {
-			// namespaced class name
-			$classPath = str_replace('\\', DIRECTORY_SEPARATOR, substr($class, 0, $pos)).DIRECTORY_SEPARATOR;
-			$className = substr($class, $pos + 1);
-		}
-		else {
-			// PEAR-like class name
-			$classPath = null;
-			$className = $class;
-		}
-
-		$className = str_replace('_', DIRECTORY_SEPARATOR, $className);
-
-		// restore the prefix
-		if ($this->allowUnderscore && DIRECTORY_SEPARATOR === $className[0]) {
-			$className[0] = '_';
-		}
-
-		$classPath .= $className.'.php';
-
-		return $classPath;
-	}
-
-	public static function resolveIncludePath($classPath) {
-		$paths = explode(PATH_SEPARATOR, get_include_path());
-
-		foreach ($paths as $path) {
-			$path = rtrim($path, '/\\');
-
-			if ($file = file_exists($path.DIRECTORY_SEPARATOR.$file)) {
-				return $file;
-			}
-		}
-
-		return false;
-	}
-}
diff --git a/wp-vendor/xrstf/composer-php52/lib/xrstf/Composer52/Generator.php b/wp-vendor/xrstf/composer-php52/lib/xrstf/Composer52/Generator.php
deleted file mode 100644
index 7c8af4de3c..0000000000
--- a/wp-vendor/xrstf/composer-php52/lib/xrstf/Composer52/Generator.php
+++ /dev/null
@@ -1,39 +0,0 @@
-<?php
-/*
- * Copyright (c) 2013, Christoph Mewes, http://www.xrstf.de
- *
- * This file is released under the terms of the MIT license. You can find the
- * complete text in the attached LICENSE file or online at:
- *
- * http://www.opensource.org/licenses/mit-license.php
- */
-
-namespace xrstf\Composer52;
-
-use Composer\Repository\CompositeRepository;
-use Composer\Script\Event;
-
-class Generator {
-	public static function onPostInstallCmd(Event $event) {
-		$composer            = $event->getComposer();
-		$installationManager = $composer->getInstallationManager();
-		$repoManager         = $composer->getRepositoryManager();
-		$localRepo           = $repoManager->getLocalRepository();
-		$package             = $composer->getPackage();
-		$config              = $composer->getConfig();
-
-		// We can't gain access to the Command's input object, so we have to look
-		// for -o / --optimize-autoloader ourselves. Sadly, neither getopt() works
-		// (always returns an empty array), nor does Symfony's Console Input, as
-		// it expects a full definition of the current command line and we can't
-		// provide that.
-
-		$args     = $_SERVER['argv'];
-		$optimize = in_array('-o', $args) || in_array('--optimize-autoloader', $args) || in_array('--optimize', $args);
-
-		$suffix   = $config->get('autoloader-suffix');
-
-		$generator = new AutoloadGenerator();
-		$generator->dump($config, $localRepo, $package, $installationManager, 'composer', $optimize, $suffix);
-	}
-}