popsu-d7/sites/all/modules/mb/mb_extra/mb_extra.install

<?php

/**
 * @file
 * Installs, updates, and uninstalls More Buttons Extra.
 */

/**
 * Implements hook_uninstall().
 */
function mb_extra_uninstall() {
  // Remove variables.
  variable_del('mb_extra_destination_tabs');
  variable_del('mb_extra_confirm_cancel');
}