luos/workflow/engine/methods/setup/pluginsRemove.php

<?php
/**
 * pluginsRemove.php
 *
 * ProcessMaker Open Source Edition
 * Copyright (C) 2004 - 2008 Colosa Inc.23
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 *
 * For more information, contact Colosa Inc, 2566 Le Jeune Rd.,
 * Coral Gables, FL, 33134, USA, or email info@colosa.com.
 */

use ProcessMaker\Plugins\PluginRegistry;

$filter = new InputFilter();
$pluginName = $_REQUEST['pluginUid'];
$pluginName = $filter->xssFilterHard($pluginName);

$pluginRegistry = PluginRegistry::loadSingleton();
$pluginRegistry->uninstallPlugin($pluginName);

G::auditLog('RemovePlugin', 'Plugin Name: ' . $pluginName);
echo $pluginName . ' ' . nl2br($filter->xssFilterHard(G::LoadTranslation('ID_MSG_REMOVE_PLUGIN_SUCCESS')));