Eccube\Service\PluginService::uninstall PHP Method

    public function uninstall(\Eccube\Entity\Plugin $plugin)
    {
        $pluginDir = $this->calcPluginDir($plugin->getCode());
        $this->app->removePluginConfigCache();
        Cache::clear($this->app, false);
        $this->callPluginManagerMethod(Yaml::parse(file_get_contents($pluginDir . '/' . self::CONFIG_YML)), 'disable');
        $this->callPluginManagerMethod(Yaml::parse(file_get_contents($pluginDir . '/' . self::CONFIG_YML)), 'uninstall');
        $this->unregisterPlugin($plugin);
        $this->deleteFile($pluginDir);
        $this->app->writePluginConfigCache();
        return true;
    }