How to Hide FluentBooking - Appointment Scheduling & Booking Solution Admin Menus

function plt_hide_fluent_booking_menus() {
	//Hide "Tools → Scheduled Actions".
	remove_submenu_page('tools.php', 'action-scheduler');

	//Hide "Fluent Booking".
	remove_menu_page('fluent-booking');
	//Hide "Fluent Booking → Dashboard".
	remove_submenu_page('fluent-booking', 'fluent-booking');
	//Hide "Fluent Booking → Calendars".
	remove_submenu_page('fluent-booking', 'fluent-booking#/calendars');
	//Hide "Fluent Booking → Bookings".
	remove_submenu_page('fluent-booking', 'fluent-booking#/scheduled-events');
	//Hide "Fluent Booking → Availability".
	remove_submenu_page('fluent-booking', 'fluent-booking#/availability');
	//Hide "Fluent Booking → Settings".
	remove_submenu_page('fluent-booking', 'fluent-booking#/settings/general-settings');
}

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

Where do I put this code?