/**
  * 删除角色
  */
 public function actionDelete()
 {
     $id = $this->get('id', 0);
     $role = Role::findByCache($id);
     if ($role) {
         if ($role['id'] == 1) {
             $this->setError(Module::t('error.role.power.edit'));
         } else {
             Role::deleteAll(['id' => $id]);
             RolePermission::deleteAll(['role_id' => $id]);
         }
     } else {
         $this->setError(Module::t('error.role.notexists'));
     }
 }