/**
  * @NoAdminRequired
  */
 public function deleteTag($old_name = "")
 {
     if ($old_name == "") {
         return new JSONResponse(array(), Http::STATUS_BAD_REQUEST);
     }
     Bookmarks::deleteTag($this->userId, $this->db, $old_name);
     return new JSONResponse(array('status' => 'success'));
 }