How to Hide WP Time Slots Booking Form Admin Menus

function plt_hide_wp_time_slots_booking_form_menus() {
	//Hide "Settings → WP Time Slots Booking Form".
	remove_submenu_page('options-general.php', 'cp_timeslotsbooking');

	//Hide "WP Time Slots Booking Form".
	remove_menu_page('cp_timeslotsbooking');
	//Hide "WP Time Slots Booking Form → WP Time Slots Booking Form".
	remove_submenu_page('cp_timeslotsbooking', 'cp_timeslotsbooking');
	//Hide "WP Time Slots Booking Form → General Settings".
	remove_submenu_page('cp_timeslotsbooking', 'cp_timeslotsbooking_settings');
	//Hide "WP Time Slots Booking Form → Add Ons".
	remove_submenu_page('cp_timeslotsbooking', 'cp_timeslotsbooking_addons');
	//Hide "WP Time Slots Booking Form → Online Demo".
	remove_submenu_page('cp_timeslotsbooking', 'cp_timeslotsbooking_odemo');
	//Hide "WP Time Slots Booking Form → I Need Help".
	remove_submenu_page('cp_timeslotsbooking', 'cp_timeslotsbooking_support');
	//Hide "WP Time Slots Booking Form → Upgrade Plugin".
	remove_submenu_page('cp_timeslotsbooking', 'cp_timeslotsbooking_upgrade');
}

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

Where do I put this code?