uninstall.php

<?php
/**
 * Aliyun CDN Helper
 * Copyright 2017 0xJacky (email : jacky-943572677@qq.com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
defined( 'WP_UNINSTALL_PLUGIN' ) OR exit(); // if uninstall.php is not called by WordPress, exit.
define( 'ALIYUN_CDN_PATH', dirname( __FILE__ ) );
require( ALIYUN_CDN_PATH . '/autoload.php' );

use CDN\WP\Config;

delete_option( Config::option_name );