How to Hide Hydra Booking - All in One Appointment Booking System with Automated Appointment Scheduling. Admin Menus

function plt_hide_hydra_booking_menus() {
	//Hide "Hydra Booking".
	remove_menu_page('hydra-booking');
	//Hide "Hydra Booking → Dashboard".
	remove_submenu_page('hydra-booking', 'hydra-booking#');
	//Hide "Hydra Booking → Meetings".
	remove_submenu_page('hydra-booking', 'hydra-booking#/meetings');
	//Hide "Hydra Booking → Bookings".
	remove_submenu_page('hydra-booking', 'hydra-booking#/bookings');
	//Hide "Hydra Booking → Hosts".
	remove_submenu_page('hydra-booking', 'hydra-booking#/hosts');
	//Hide "Hydra Booking → Settings".
	remove_submenu_page('hydra-booking', 'hydra-booking#/settings');
	//Hide "Hydra Booking → Setup Wizard".
	remove_submenu_page('hydra-booking', 'hydra-booking#/setup-wizard');
}

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

Where do I put this code?