Media: Remove unused `refresh` from _requery.

In [50067] `props.cache` was removed as it was unused. This left a lingering unused `refresh` in the `_requery` function.

Props peterwilsoncc.
See #50025.

Built from https://develop.svn.wordpress.org/trunk@50068


git-svn-id: http://core.svn.wordpress.org/trunk@49769 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/js/media-models.js

@@ -911,8 +911,9 @@ var Attachments = Backbone.Collection.extend(/** @lends wp.media.model.Attachmen
 	 * If the collection is a query, create and mirror an Attachments Query collection.
 	 * 
 	 * @access private
+	 * @param {Boolean} refresh Deprecated, refresh parameter no longer used.
 	 */
-	_requery: function( refresh ) {
+	_requery: function() {
 		var props;
 		if ( this.props.get('query') ) {
 			props = this.props.toJSON();

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.7-alpha-50067';
+$wp_version = '5.7-alpha-50068';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.