Callback::unbindByCode

static function unbindByCode($handlerCode)
{
	global $USER_FIELD_MANAGER;

	$eventManager = EventManager::getInstance();
	$eventManager->unRegisterEventHandler('main', 'OnUserTypeBuildList', 'rest', __CLASS__, $handlerCode);

	$USER_FIELD_MANAGER->CleanCache();
	static::$descriptionCache = null;
	BitrixRestPlacementTable::clearHandlerCache();
}