Remove unused references to global $wpdb

git-svn-id: http://svn.automattic.com/wordpress/trunk@13240 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/formatting.php

@@ -1208,11 +1208,8 @@ function untrailingslashit($string) {
  * @return string Returns a string escaped with slashes.
  */
 function addslashes_gpc($gpc) {
-	global $wpdb;
-
-	if (get_magic_quotes_gpc()) {
+	if ( get_magic_quotes_gpc() )
 		$gpc = stripslashes($gpc);
-	}
 
 	return esc_sql($gpc);
 }

wp-includes/functions.php

@@ -1442,15 +1442,12 @@ function remove_query_arg( $key, $query=false ) {
 /**
  * Walks the array while sanitizing the contents.
  *
- * @uses $wpdb Used to sanitize values
  * @since 0.71
  *
  * @param array $array Array to used to walk while sanitizing contents.
  * @return array Sanitized $array.
  */
 function add_magic_quotes( $array ) {
-	global $wpdb;
-
 	foreach ( (array) $array as $k => $v ) {
 		if ( is_array( $v ) ) {
 			$array[$k] = add_magic_quotes( $v );

wp-includes/link-template.php

@@ -1076,7 +1076,7 @@ function prev_post_rel_link($title = '%title', $in_same_cat = false, $excluded_c
  * @return object
  */
 function get_boundary_post($in_same_cat = false, $excluded_categories = '', $start = true) {
-	global $post, $wpdb;
+	global $post;
 
 	if ( empty($post) || !is_single() || is_attachment() )
 		return null;

wp-includes/ms-functions.php

@@ -1051,8 +1051,6 @@ function get_current_site() {
 }
 
 function get_user_id_from_string( $string ) {
-	global $wpdb;
-
 	$user_id = 0;
 	if ( is_email( $string ) ) {
 		$user = get_user_by('email', $string);

wp-includes/post.php

@@ -3930,7 +3930,7 @@ function update_postmeta_cache($post_ids) {
  * @param bool $clean_terms optional. Whether to clean terms cache
  */
 function clean_attachment_cache($id, $clean_terms = false) {
-	global $_wp_suspend_cache_invalidation, $wpdb;
+	global $_wp_suspend_cache_invalidation;
 
 	if ( !empty($_wp_suspend_cache_invalidation) )
 		return;

wp-includes/rss.php

@@ -715,7 +715,6 @@ class RSSCache {
 	Output:		true on sucess
 \*=======================================================================*/
 	function set ($url, $rss) {
-		global $wpdb;
 		$cache_option = 'rss_' . $this->file_name( $url );
 
 		set_transient($cache_option, $rss, $this->MAX_AGE);