Coding Standards: Remove unused global variables in various `/wp-admi…

…n/includes/` files.

Props upadalavipul.
Fixes #59254.





git-svn-id: https://develop.svn.wordpress.org/trunk@56499 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/includes/class-wp-privacy-policy-content.php

@@ -130,12 +130,8 @@ public static function text_change_check() {
 	 * Outputs a warning when some privacy info has changed.
 	 *
 	 * @since 4.9.6
-	 *
-	 * @global WP_Post $post Global post object.
 	 */
 	public static function policy_text_changed_notice() {
-		global $post;
-
 		$screen = get_current_screen()->id;
 
 		if ( 'privacy' !== $screen ) {

src/wp-admin/includes/ms.php

@@ -58,14 +58,10 @@ function check_upload_size( $file ) {
  * @since 3.0.0
  * @since 5.1.0 Use wp_delete_site() internally to delete the site row from the database.
  *
- * @global wpdb $wpdb WordPress database abstraction object.
- *
  * @param int  $blog_id Site ID.
  * @param bool $drop    True if site's database tables should be dropped. Default false.
  */
 function wpmu_delete_blog( $blog_id, $drop = false ) {
-	global $wpdb;
-
 	$blog_id = (int) $blog_id;
 
 	$switch = false;

src/wp-admin/includes/upgrade.php

@@ -625,10 +625,9 @@ function wp_new_blog_notification( $blog_title, $blog_url, $user_id, $password )
 	 *
 	 * @global int  $wp_current_db_version The old (current) database version.
 	 * @global int  $wp_db_version         The new database version.
-	 * @global wpdb $wpdb                  WordPress database abstraction object.
 	 */
 	function wp_upgrade() {
-		global $wp_current_db_version, $wp_db_version, $wpdb;
+		global $wp_current_db_version, $wp_db_version;
 
 		$wp_current_db_version = __get_option( 'db_version' );