FileDiskProperty::deleteAllAttachedFiles

static function deleteAllAttachedFiles($entityId)
{
	$userFieldManager = Driver::getInstance()->getUserFieldManager();
	list($connectorClass, $moduleId) = $userFieldManager->getConnectorDataByEntityType("iblock_element");
	AttachedObject::detachByFilter(
		array('=ENTITY_ID' => $entityId, "=ENTITY_TYPE" => $connectorClass, "=MODULE_ID" => $moduleId)
	);
}