public function delete($id)
    {
        unset($this->appServer[$id]);

        $query = "DELETE FROM oxconfig WHERE oxvarname = ? and oxshopid = ?";

        $parameter = [
            self::CONFIG_NAME_FOR_SERVER_INFO.$id,
            $this->config->getBaseShopId()
        ];

        $this->database->execute($query, $parameter);
    }