How to Hide Booking Weir Admin Menus

function plt_hide_booking_weir_menus() {
	//Hide "Booking".
	remove_menu_page('booking-weir');
	//Hide "Booking → Calendars".
	remove_submenu_page('booking-weir', 'booking-weir');
	//Hide "Booking → Events".
	remove_submenu_page('booking-weir', 'edit.php?post_type=bw_event');
	//Hide "Booking → Logs".
	remove_submenu_page('booking-weir', 'booking-weir-logs');
	//Hide "Booking → About".
	remove_submenu_page('booking-weir', 'booking-weir-about');
	//Hide "Booking → Contact Us".
	remove_submenu_page('booking-weir', 'booking-weir-contact');
	//Hide "Booking → Support Forum".
	remove_submenu_page('booking-weir', 'booking-weir-wp-support-forum');
	//Hide "Booking → Upgrade".
	remove_submenu_page('booking-weir', 'booking-weir-pricing');
}

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