/**
  * 删除权限
  */
 public function actionDelete()
 {
     $id = $this->get('id', 0);
     if ($id == 1) {
         $this->setError(Module::t('error.perm.root.delete'));
     } else {
         $ret = Permission::remove($id);
         if (!$ret) {
             $this->setError(Module::t('error.delete'));
         }
     }
 }