diff --git a/wp-admin/includes/update-core.php b/wp-admin/includes/update-core.php
index 66eaa1fa83..2b458a53d8 100644
--- a/wp-admin/includes/update-core.php
+++ b/wp-admin/includes/update-core.php
@@ -554,10 +554,13 @@ $_old_files = array(
 // 3.6
 'wp-admin/js/revisions-js.php',
 'wp-admin/images/screenshots',
-'wp-admin/js/categories.js', 
-'wp-admin/js/categories.min.js', 
-'wp-admin/js/custom-fields.js', 
+'wp-admin/js/categories.js',
+'wp-admin/js/categories.min.js',
+'wp-admin/js/custom-fields.js',
 'wp-admin/js/custom-fields.min.js',
+// 3.7
+'wp-admin/js/cat.js',
+'wp-admin/js/cat.min.js',
 );
 
 /**
diff --git a/wp-admin/js/cat.js b/wp-admin/js/cat.js
deleted file mode 100644
index 772ab5a28c..0000000000
--- a/wp-admin/js/cat.js
+++ /dev/null
@@ -1,5 +0,0 @@
-jQuery(document).ready( function($) {
-	var myConfirm = function() { return '' !== $('#newcat').val(); };
-	$('#jaxcat').prepend('<span id="ajaxcat"><input type="text" name="newcat" id="newcat" size="16" autocomplete="off"/><input type="button" name="Button" data-wp-lists="add:categorychecklist:jaxcat" id="catadd" value="' + catL10n.add + '"/><input type="hidden"/><input type="hidden"/><span id="howto">' + catL10n.how + '</span></span><span id="cat-ajax-response"></span>');
-	$('#categorychecklist').wpList( { alt: '', response: 'cat-ajax-response', confirm: myConfirm } );
-} );
diff --git a/wp-admin/js/cat.min.js b/wp-admin/js/cat.min.js
deleted file mode 100644
index 5015160db3..0000000000
--- a/wp-admin/js/cat.min.js
+++ /dev/null
@@ -1 +0,0 @@
-jQuery(document).ready(function(a){var b=function(){return""!==a("#newcat").val()};a("#jaxcat").prepend('<span id="ajaxcat"><input type="text" name="newcat" id="newcat" size="16" autocomplete="off"/><input type="button" name="Button" data-wp-lists="add:categorychecklist:jaxcat" id="catadd" value="'+catL10n.add+'"/><input type="hidden"/><input type="hidden"/><span id="howto">'+catL10n.how+'</span></span><span id="cat-ajax-response"></span>'),a("#categorychecklist").wpList({alt:"",response:"cat-ajax-response",confirm:b})});
\ No newline at end of file
diff --git a/wp-includes/script-loader.php b/wp-includes/script-loader.php
index b51ecb91a6..be5797a5c7 100644
--- a/wp-includes/script-loader.php
+++ b/wp-includes/script-loader.php
@@ -384,13 +384,6 @@ function wp_default_scripts( &$scripts ) {
 	$scripts->add( 'mce-view', "/wp-includes/js/mce-view$suffix.js", array( 'shortcode', 'media-models' ), false, 1 );
 
 	if ( is_admin() ) {
-		$scripts->add( 'ajaxcat', "/wp-admin/js/cat$suffix.js", array( 'wp-lists' ) );
-		$scripts->add_data( 'ajaxcat', 'group', 1 );
-		did_action( 'init' ) && $scripts->localize( 'ajaxcat', 'catL10n', array(
-			'add' => esc_attr(__('Add')),
-			'how' => __('Separate multiple categories with commas.')
-		) );
-
 		$scripts->add( 'admin-tags', "/wp-admin/js/tags$suffix.js", array('jquery', 'wp-ajax-response'), false, 1 );
 		did_action( 'init' ) && $scripts->localize( 'admin-tags', 'tagsl10n', array(
 			'noPerm' => __('You do not have permission to do that.'),