How to Hide WangGuard Admin Menus

function plt_hide_wangguard_menus() {
	//Hide "WangGuard".
	remove_menu_page('wangguard_conf');
	//Hide "WangGuard → Configuration".
	remove_submenu_page('wangguard_conf', 'wangguard_conf');
	//Hide "WangGuard → Users".
	remove_submenu_page('wangguard_conf', 'wangguard_users');
	//Hide "WangGuard → Signup Moderation".
	remove_submenu_page('wangguard_conf', 'wangguard_signupmod');
	//Hide "WangGuard → Moderation Queue".
	remove_submenu_page('wangguard_conf', 'wangguard_queue');
	//Hide "WangGuard → Wizard".
	remove_submenu_page('wangguard_conf', 'wangguard_wizard');
	//Hide "WangGuard → Cron Jobs".
	remove_submenu_page('wangguard_conf', 'wangguard_cronjobs');
	//Hide "WangGuard → Stats".
	remove_submenu_page('wangguard_conf', 'wangguard_stats');
	//Hide "WangGuard → Add-Ons".
	remove_submenu_page('wangguard_conf', 'wangguard_addons');
	//Hide "WangGuard → Third party plugins".
	remove_submenu_page('wangguard_conf', 'wangguard_compatible_plugins');
	//Hide "WangGuard → About".
	remove_submenu_page('wangguard_conf', 'wangguard_about');
	//Hide "WangGuard → Help".
	remove_submenu_page('wangguard_conf', 'wangguard_help');
}

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

Where do I put this code?