How to Hide Event Organiser Admin Menus

function plt_hide_event_organiser_menus() {
	//Hide "Settings → Event Organiser".
	remove_submenu_page('options-general.php', 'event-settings');

	//Hide "Events".
	remove_menu_page('edit.php?post_type=event');
	//Hide "Events → All Events".
	remove_submenu_page('edit.php?post_type=event', 'edit.php?post_type=event');
	//Hide "Events → Add New Event".
	remove_submenu_page('edit.php?post_type=event', 'post-new.php?post_type=event');
	//Hide "Events → Categories".
	remove_submenu_page('edit.php?post_type=event', 'edit-tags.php?taxonomy=event-category&post_type=event');
	//Hide "Events → Tags".
	remove_submenu_page('edit.php?post_type=event', 'edit-tags.php?taxonomy=event-tag&post_type=event');
	//Hide "Events → Venues".
	remove_submenu_page('edit.php?post_type=event', 'venues');
	//Hide "Events → Calendar View".
	remove_submenu_page('edit.php?post_type=event', 'calendar');
	//Hide "Events → System Info".
	remove_submenu_page('edit.php?post_type=event', 'debug');
	//Hide "Events → Extensions".
	remove_submenu_page('edit.php?post_type=event', 'eo-addons');
}

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