How to Hide Webba Booking Admin Menus

function plt_hide_webba_booking_lite_menus() {
	//Hide "Webba Booking".
	remove_menu_page('wbk-main');
	//Hide "Webba Booking → Dashboard".
	remove_submenu_page('wbk-main', 'wbk-dashboard');
	//Hide "Webba Booking → Services".
	remove_submenu_page('wbk-main', 'wbk-services');
	//Hide "Webba Booking → Bookings".
	remove_submenu_page('wbk-main', 'wbk-appointments');
	//Hide "Webba Booking → Calendar".
	remove_submenu_page('wbk-main', 'wbk-calendar');
	//Hide "Webba Booking → Appearance".
	remove_submenu_page('wbk-main', 'wbk-appearance');
	//Hide "Webba Booking → Email notifications".
	remove_submenu_page('wbk-main', 'wbk-email-templates');
	//Hide "Webba Booking → Pricing rules".
	remove_submenu_page('wbk-main', 'wbk-pricing-rules');
	//Hide "Webba Booking → SETTINGS".
	remove_submenu_page('wbk-main', 'wbk-options');
	//Hide "Webba Booking → Affiliation".
	remove_submenu_page('wbk-main', 'wbk-main-affiliation');
	//Hide "Webba Booking → Contact Us".
	remove_submenu_page('wbk-main', 'wbk-main-contact');
	//Hide "Webba Booking → Upgrade".
	remove_submenu_page('wbk-main', 'wbk-main-pricing');
}

add_action('admin_menu', 'plt_hide_webba_booking_lite_menus', 1000000000);
Where do I put this code?