/**
  * Removes a persistent Notice
  *
  * @ajax
  * @param   string  id
  */
 public function action_remove()
 {
     if (!Request::$is_ajax) {
         throw new Kohana_Request_Exception('Trying to access an AJAX method without AJAX.');
     }
     $hash = $this->request->param('id');
     $response = array('status' => 'success', 'message' => 'Notice ' . $hash . ' was removed.', 'data' => NULL);
     $notice = Notices::get($hash);
     if (!is_null($notice)) {
         $notice->set_rendered_state(TRUE);
         $notice->remove_persistence();
         $response['data'] = $notice;
         Notices::save();
     } else {
         $response['status'] = 'error';
         $response['message'] = 'Notice ' . $hash . ' was not found.';
     }
     $this->request->response = json_encode($response);
 }