How to Hide the "Google Language Translator" Admin Menu

function plt_hide_google_language_translator_menus() {
	//Hide the "Settings → Google Language Translator" menu.
	remove_submenu_page('options-general.php', 'google_language_translator');
}

add_action('admin_menu', 'plt_hide_google_language_translator_menus', 11);

Where do I put this code?