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/capabilities.php

@@ -140,7 +140,7 @@ class WP_Roles {
 		if ( ! $this->use_db )
 			return;
 
-		global $wpdb, $wp_user_roles;
+		global $wpdb;
 
 		// Duplicated from _init() to avoid an extra function call.
 		$this->role_key = $wpdb->get_blog_prefix() . 'user_roles';

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];

src/wp-includes/general-template.php

@@ -753,7 +753,7 @@ function get_bloginfo( $show = '', $filter = 'raw' ) {
  * @return string|null String on retrieve, null when displaying.
  */
 function wp_title($sep = '»', $display = true, $seplocation = '') {
-	global $wpdb, $wp_locale;
+	global $wp_locale;
 
 	$m = get_query_var('m');
 	$year = get_query_var('year');

src/wp-includes/taxonomy.php

@@ -3161,8 +3161,6 @@ function wp_update_term_count( $terms, $taxonomy, $do_deferred=false ) {
  * @return bool Always true when complete.
  */
 function wp_update_term_count_now( $terms, $taxonomy ) {
-	global $wpdb;
-
 	$terms = array_map('intval', $terms);
 
 	$taxonomy = get_taxonomy($taxonomy);