How to Hide Events Calendar Plus Admin Menus

function plt_hide_events_calendar_plus_menus() {
	//Hide "Calendar ✚".
	remove_menu_page('edit.php?post_type=calendar-event');
	//Hide "Calendar ✚ → Events".
	remove_submenu_page('edit.php?post_type=calendar-event', 'edit.php?post_type=calendar-event');
	//Hide "Calendar ✚ → Add New Event".
	remove_submenu_page('edit.php?post_type=calendar-event', 'post-new.php?post_type=calendar-event');
	//Hide "Calendar ✚ → Event Categories".
	remove_submenu_page('edit.php?post_type=calendar-event', 'edit-tags.php?taxonomy=calendar-event-category&post_type=calendar-event');
	//Hide "Calendar ✚ → Event Tags".
	remove_submenu_page('edit.php?post_type=calendar-event', 'edit-tags.php?taxonomy=calendar-event-tag&post_type=calendar-event');
	//Hide "Calendar ✚ → Calendar ✚  Settings".
	remove_submenu_page('edit.php?post_type=calendar-event', 'events-calendar-plus-settings');
	//Hide "Calendar ✚ → Help & How To".
	remove_submenu_page('edit.php?post_type=calendar-event', 'events-calendar-plus-support');
}

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

Where do I put this code?