How to Hide Salon Booking Admin Menus

function plt_hide_salon_booking_menus() {
	//Hide "Salon Maintenance".
	remove_menu_page('salon-booking-maintenace');
	//Hide "Salon Maintenance → Customer Info".
	remove_submenu_page('salon-booking-maintenace', 'salon-booking-maintenace');
	//Hide "Salon Maintenance → Menu Information".
	remove_submenu_page('salon-booking-maintenace', 'salon_item');
	//Hide "Salon Maintenance → Staff Information".
	remove_submenu_page('salon-booking-maintenace', 'salon_staff');
	//Hide "Salon Maintenance → Shop Information".
	remove_submenu_page('salon-booking-maintenace', 'salon_branch');
	//Hide "Salon Maintenance → Environment Setting".
	remove_submenu_page('salon-booking-maintenace', 'salon_config');
	//Hide "Salon Maintenance → Mail Setting".
	remove_submenu_page('salon-booking-maintenace', 'salon_mail');
	//Hide "Salon Maintenance → Reservation Screen".
	remove_submenu_page('salon-booking-maintenace', 'salon_configbooking');
	//Hide "Salon Maintenance → Position Information".
	remove_submenu_page('salon-booking-maintenace', 'salon_position');
	//Hide "Salon Maintenance → View Log".
	remove_submenu_page('salon-booking-maintenace', 'salon_log');
	//Hide "Salon Maintenance → Category".
	remove_submenu_page('salon-booking-maintenace', 'salon_category');

	//Hide "Salon Management".
	remove_menu_page('salon-booking-management');
	//Hide "Salon Management → Reservation Regist".
	remove_submenu_page('salon-booking-management', 'salon-booking-management');
	//Hide "Salon Management → Performance Regist".
	remove_submenu_page('salon-booking-management', 'salon_sales');
	//Hide "Salon Management → Promotion".
	remove_submenu_page('salon-booking-management', 'salon_promotion');
	//Hide "Salon Management → Time Card".
	remove_submenu_page('salon-booking-management', 'salon_working');
	//Hide "Salon Management → Basic Information".
	remove_submenu_page('salon-booking-management', 'salon_basic');
	//Hide "Salon Management → Customer Record".
	remove_submenu_page('salon-booking-management', 'salon_record');
}

add_action('admin_menu', 'plt_hide_salon_booking_menus', 11);
Where do I put this code?