How to Hide YPSupport Shift Scheduler Admin Menus

function plt_hide_ypsupport_shift_scheduler_menus() {
	//Hide "Shift Scheduler".
	remove_menu_page('ypsupport-shift-scheduler');
	//Hide "Shift Scheduler → Calendar".
	remove_submenu_page('ypsupport-shift-scheduler', 'ypsupport-shift-scheduler');
	//Hide "Shift Scheduler → Shift List".
	remove_submenu_page('ypsupport-shift-scheduler', 'ypsupport-shift-scheduler-list');
	//Hide "Shift Scheduler → Add Shift".
	remove_submenu_page('ypsupport-shift-scheduler', 'ypsupport-shift-scheduler-add');
	//Hide "Shift Scheduler → Requests".
	remove_submenu_page('ypsupport-shift-scheduler', 'ypsupport-shift-scheduler-requests');
	//Hide "Shift Scheduler → Auto-Generate".
	remove_submenu_page('ypsupport-shift-scheduler', 'ypsupport-shift-scheduler-auto');
	//Hide "Shift Scheduler → Staff Management".
	remove_submenu_page('ypsupport-shift-scheduler', 'ypsupport-shift-scheduler-staff');
	//Hide "Shift Scheduler → Grouping 🔒".
	remove_submenu_page('ypsupport-shift-scheduler', 'ypsupport-shift-scheduler-groups');
	//Hide "Shift Scheduler → Shift Settings".
	remove_submenu_page('ypsupport-shift-scheduler', 'ypsupport-shift-scheduler-schedule');
	//Hide "Shift Scheduler → Holiday Settings 🔒".
	remove_submenu_page('ypsupport-shift-scheduler', 'ypsupport-shift-scheduler-holidays');
	//Hide "Shift Scheduler → Page Links".
	remove_submenu_page('ypsupport-shift-scheduler', 'ypsupport-shift-scheduler-links');
	//Hide "Shift Scheduler → Email Notifications".
	remove_submenu_page('ypsupport-shift-scheduler', 'ypsupport-shift-scheduler-mail');
	//Hide "Shift Scheduler → Contact Us".
	remove_submenu_page('ypsupport-shift-scheduler', 'ypsupport-shift-scheduler-contact');
	//Hide "Shift Scheduler → Upgrade".
	remove_submenu_page('ypsupport-shift-scheduler', 'ypsupport-shift-scheduler-pricing');
}

add_action('admin_menu', 'plt_hide_ypsupport_shift_scheduler_menus', 1000000000);

Where do I put this code?