materio-base-d7/sites/all/modules/contrib/users/genpass/genpass.install

<?php

/*
 * Implements hook_uninstall().
 */
function genpass_uninstall() {
  variable_del('genpass_algorithm');
  variable_del('genpass_display');
  variable_del('genpass_entropy');
  variable_del('genpass_length');
  variable_del('genpass_mode');
}