How to Hide Appointment Booking Lite Admin Menus

function plt_hide_motopress_appointment_lite_menus() {
	//Hide "Appointments".
	remove_menu_page('mpa_appointment_menu');
	//Hide "Appointments → Calendar".
	remove_submenu_page('mpa_appointment_menu', 'mpa_calendar');
	//Hide "Appointments → Bookings".
	remove_submenu_page('mpa_appointment_menu', 'edit.php?post_type=mpa_booking');
	//Hide "Appointments → Payments".
	remove_submenu_page('mpa_appointment_menu', 'edit.php?post_type=mpa_payment');
	//Hide "Appointments → Employees".
	remove_submenu_page('mpa_appointment_menu', 'edit.php?post_type=mpa_employee');
	//Hide "Appointments → Locations".
	remove_submenu_page('mpa_appointment_menu', 'edit.php?post_type=mpa_location');
	//Hide "Appointments → Schedules".
	remove_submenu_page('mpa_appointment_menu', 'edit.php?post_type=mpa_schedule');
	//Hide "Appointments → Services".
	remove_submenu_page('mpa_appointment_menu', 'edit.php?post_type=mpa_service');
	//Hide "Appointments → Service Categories".
	remove_submenu_page('mpa_appointment_menu', 'edit-tags.php?post_type=mpa_service&taxonomy=mpa_service_category');
	//Hide "Appointments → Service Tags".
	remove_submenu_page('mpa_appointment_menu', 'edit-tags.php?post_type=mpa_service&taxonomy=mpa_service_tag');
	//Hide "Appointments → Coupons".
	remove_submenu_page('mpa_appointment_menu', 'edit.php?post_type=mpa_coupon');
	//Hide "Appointments → Notifications".
	remove_submenu_page('mpa_appointment_menu', 'edit.php?post_type=mpa_notification');
	//Hide "Appointments → Customers".
	remove_submenu_page('mpa_appointment_menu', 'mpa_customers');
	//Hide "Appointments → Analytics".
	remove_submenu_page('mpa_appointment_menu', 'mpa_analytics');
	//Hide "Appointments → Shortcodes".
	remove_submenu_page('mpa_appointment_menu', 'edit.php?post_type=mpa_shortcode');
	//Hide "Appointments → Settings".
	remove_submenu_page('mpa_appointment_menu', 'mpa_settings');
	//Hide "Appointments → Help".
	remove_submenu_page('mpa_appointment_menu', 'mpa_help');
	//Hide "Appointments → Extensions".
	remove_submenu_page('mpa_appointment_menu', 'mpa_extensions');
	//Hide "Appointments → Go Premium".
	remove_submenu_page('mpa_appointment_menu', 'mpa_premium');
}

add_action('admin_menu', 'plt_hide_motopress_appointment_lite_menus', 16);
Where do I put this code?