Customizer: Remove unused string.

see #32576.
Built from https://develop.svn.wordpress.org/trunk@33167


git-svn-id: http://core.svn.wordpress.org/trunk@33139 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-customize-nav-menus.php

@@ -292,7 +292,6 @@ final class WP_Customize_Nav_Menus {
 				'custom_label'      => __( 'Custom Link' ),
 				/* translators: %s: Current menu location */
 				'menuLocation'      => __( '(Currently set to: %s)' ),
-				'deleteWarn'        => __( 'You are about to permanently delete this menu. "Cancel" to stop, "OK" to delete.' ),
 				'itemAdded'         => __( 'Menu item added' ),
 				'itemDeleted'       => __( 'Menu item deleted' ),
 				'menuAdded'         => __( 'Menu created' ),

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.3-beta2-33166';
+$wp_version = '4.3-beta2-33167';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.