public function disable()
 {
     $language = new Language($this->config);
     $layout_strings = $language->getFile('administrator/layout.php');
     unset($layout_strings['module_exchange_rates']);
     $language->updateFile('administrator/layout.php', $layout_strings);
     // Remove some menu items to the admin menu
     $main_menu = new Menu($this->config, $language);
     $main_menu->loadMenu('menu_admin_main.php');
     $menu = $main_menu->getMenuData();
     unset($menu['content']['children']['exchange_rates']);
     $main_menu->setMenuData($menu);
     $main_menu->update();
 }