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-admin/includes/ajax-actions.php

@@ -103,8 +103,6 @@ function wp_ajax_fetch_list() {
  * @since 3.1.0
  */
 function wp_ajax_ajax_tag_search() {
-	global $wpdb;
-
 	if ( isset( $_GET['tax'] ) ) {
 		$taxonomy = sanitize_key( $_GET['tax'] );
 		$tax = get_taxonomy( $taxonomy );
@@ -894,7 +892,7 @@ function wp_ajax_get_comments( $action ) {
  * @param string $action Action to perform.
  */
 function wp_ajax_replyto_comment( $action ) {
-	global $wp_list_table, $wpdb;
+	global $wp_list_table;
 	if ( empty( $action ) )
 		$action = 'replyto-comment';
 

src/wp-admin/includes/dashboard.php

@@ -761,8 +761,6 @@ function wp_dashboard_recent_posts( $args ) {
  * @return bool False if no comments were found. True otherwise.
  */
 function wp_dashboard_recent_comments( $total_items = 5 ) {
-	global $wpdb;
-
 	// Select all comment types and filter out spam later for better query performance.
 	$comments = array();
 

src/wp-admin/includes/meta-boxes.php

@@ -623,8 +623,6 @@ function post_comment_meta_box_thead($result) {
  * @param object $post
  */
 function post_comment_meta_box( $post ) {
-	global $wpdb;
-
 	wp_nonce_field( 'get-comments', 'add_comment_nonce', false );
 	?>
 	<p class="hide-if-no-js" id="add-new-comment"><a class="button" href="#commentstatusdiv" onclick="window.commentReply && commentReply.addcomment(<?php echo $post->ID; ?>);return false;"><?php _e('Add comment'); ?></a></p>

src/wp-admin/includes/post.php

@@ -518,8 +518,6 @@ function bulk_edit_posts( $post_data = null ) {
  * @return WP_Post Post object containing all the default post data as attributes
  */
 function get_default_post_to_edit( $post_type = 'post', $create_in_db = false ) {
-	global $wpdb;
-
 	$post_title = '';
 	if ( !empty( $_REQUEST['post_title'] ) )
 		$post_title = esc_html( wp_unslash( $_REQUEST['post_title'] ));
@@ -733,7 +731,6 @@ function write_post() {
  * @return unknown
  */
 function add_meta( $post_ID ) {
-	global $wpdb;
 	$post_ID = (int) $post_ID;
 
 	$metakeyselect = isset($_POST['metakeyselect']) ? wp_unslash( trim( $_POST['metakeyselect'] ) ) : '';