diff --git a/wp-includes/class-wp-editor.php b/wp-includes/class-wp-editor.php
index ace9b843cd..3f639112d1 100644
--- a/wp-includes/class-wp-editor.php
+++ b/wp-includes/class-wp-editor.php
@@ -565,10 +565,10 @@ final class _WP_Editors {
 				 * @param array  $buttons   An array of teenyMCE buttons.
 				 * @param string $editor_id Unique editor identifier, e.g. 'content'.
 				 */
-				$mce_buttons = apply_filters( 'teeny_mce_buttons', array('bold', 'italic', 'underline', 'blockquote', 'strikethrough', 'bullist', 'numlist', 'alignleft', 'aligncenter', 'alignright', 'undo', 'redo', 'link', 'unlink', 'fullscreen'), $editor_id );
+				$mce_buttons = apply_filters( 'teeny_mce_buttons', array('bold', 'italic', 'underline', 'blockquote', 'strikethrough', 'bullist', 'numlist', 'alignleft', 'aligncenter', 'alignright', 'undo', 'redo', 'link', 'fullscreen'), $editor_id );
 				$mce_buttons_2 = $mce_buttons_3 = $mce_buttons_4 = array();
 			} else {
-				$mce_buttons = array( 'formatselect', 'bold', 'italic', 'bullist', 'numlist', 'blockquote', 'alignleft', 'aligncenter', 'alignright', 'link', 'unlink', 'wp_more', 'spellchecker' );
+				$mce_buttons = array( 'formatselect', 'bold', 'italic', 'bullist', 'numlist', 'blockquote', 'alignleft', 'aligncenter', 'alignright', 'link', 'wp_more', 'spellchecker' );
 
 				if ( ! wp_is_mobile() ) {
 					if ( $set['_content_editor_dfw'] ) {
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 0742204549..b669088823 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9-beta1-41830';
+$wp_version = '4.9-beta1-41831';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.