How to Hide App for Cloudflare® Admin Menus

function plt_hide_app_for_cf_menus() {
	//Hide "Settings → Cloudflare".
	remove_submenu_page('options-general.php', 'app-for-cf');

	//Hide "Cloudflare !".
	remove_menu_page('app-for-cf_caching');
	//Hide "Cloudflare ! → Public page caching".
	remove_submenu_page('app-for-cf_caching', 'app-for-cf_caching');
	//Hide "Cloudflare ! → Firewall".
	remove_submenu_page('app-for-cf_caching', 'app-for-cf_firewall');
	//Hide "Cloudflare ! → Access".
	remove_submenu_page('app-for-cf_caching', 'app-for-cf_access');
	//Hide "Cloudflare ! → Rules".
	remove_submenu_page('app-for-cf_caching', 'app-for-cf_rules');
	//Hide "Cloudflare ! → R2 (media storage)".
	remove_submenu_page('app-for-cf_caching', 'app-for-cf_r2');
	//Hide "Cloudflare ! → DMARC management".
	remove_submenu_page('app-for-cf_caching', 'app-for-cf_dmarc');
	//Hide "Cloudflare ! → Purge cache".
	remove_submenu_page('app-for-cf_caching', 'app-for-cf_cache');
	//Hide "Cloudflare ! → HTTP request trace".
	remove_submenu_page('app-for-cf_caching', 'app-for-cf_request-trace');
	//Hide "Cloudflare ! → IP address details".
	remove_submenu_page('app-for-cf_caching', 'app-for-cf_ip-details');
	//Hide "Cloudflare ! → Domain details".
	remove_submenu_page('app-for-cf_caching', 'app-for-cf_domain-details');
	//Hide "Cloudflare ! → WHOIS".
	remove_submenu_page('app-for-cf_caching', 'app-for-cf_whois');
	//Hide "Cloudflare ! → Settings Missing API token".
	remove_submenu_page('app-for-cf_caching', 'options-general.php?page=app-for-cf');
}

add_action('admin_menu', 'plt_hide_app_for_cf_menus', 11);
Where do I put this code?