How to Hide Progressive WordPress (PWA) Admin Menus

function plt_hide_progressive_wp_menus() {
	//Hide "Progressive WP".
	remove_menu_page('progressive-wordpress');
	//Hide "Progressive WP → About".
	remove_submenu_page('progressive-wordpress', 'progressive-wordpress');
	//Hide "Progressive WP → Add to Homescreen".
	remove_submenu_page('progressive-wordpress', 'pwp-manifest');
	//Hide "Progressive WP → Offline usage".
	remove_submenu_page('progressive-wordpress', 'pwp-offlineusage');
	//Hide "Progressive WP → Push Notifications".
	remove_submenu_page('progressive-wordpress', 'pwp-push');
}

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

Where do I put this code?