Transients: After [41963], add missing cron task for delete_expired_transients().

Props dlh.
Fixes #41699.
Built from https://develop.svn.wordpress.org/trunk@42008


git-svn-id: http://core.svn.wordpress.org/trunk@41842 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/admin.php

@@ -87,6 +87,11 @@ auth_redirect();
 if ( ! wp_next_scheduled( 'wp_scheduled_delete' ) && ! wp_installing() )
 	wp_schedule_event(time(), 'daily', 'wp_scheduled_delete');
 
+// Schedule Transient cleanup.
+if ( ! wp_next_scheduled( 'delete_expired_transients' ) && ! wp_installing() ) {
+	wp_schedule_event( time(), 'daily', 'delete_expired_transients' );
+}
+
 set_screen_options();
 
 $date_format = __( 'F j, Y' );
@@ -94,9 +99,6 @@ $time_format = __( 'g:i a' );
 
 wp_enqueue_script( 'common' );
 
-
-
-
 /**
  * $pagenow is set in vars.php
  * $wp_importers is sometimes set in wp-admin/includes/import.php