CTaskFiles::removeTemporaryFile

static function removeTemporaryFile($userId, $fileId)
{
	$userId = (int) $userId;
	$fileId = (int) $fileId;

	if (self::isTemporaryFileRegistered($userId, $fileId))
	{
		self::unregisterTemporaryFiles(array($fileId));
		CFile::Delete($fileId);
	}
}