yii\rbac\DbManager::removeAllRules PHP Method

    public function removeAllRules()
    {
        if (!$this->supportsCascadeUpdate()) {
            $this->db->createCommand()->update($this->itemTable, ['rule_name' => null])->execute();
        }
        $this->db->createCommand()->delete($this->ruleTable)->execute();
        $this->invalidateCache();
    }

 public function actionRemoveAllRules()
 {
     if ($this->confirm('Are you sure want to remove all rules? All roles and permissions which have rules will be adjusted accordingly')) {
         $this->_authManager->removeAllRules();
     }
     return 0;
 }