These functions import $wpdb but do not use it.

See #27882.


git-svn-id: https://develop.svn.wordpress.org/trunk@28539 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-xmlrpc-server.php

@@ -3190,8 +3190,6 @@ class wp_xmlrpc_server extends IXR_Server {
 	 * @return mixed {@link wp_new_comment()}
 	 */
 	public function wp_newComment($args) {
-		global $wpdb;
-
 		$this->escape($args);
 
 		$blog_id	= (int) $args[0];