File::deleteFile

static function deleteFile($cid, $hash, $path)
{
	if (FileInputUtility::instance()->unRegisterFile($cid, $hash))
	{
		$io = \CBXVirtualIo::GetInstance();
		$directory = $io->GetDirectory($path.$hash);
		$res = $directory->GetChildren();
		foreach($res as $file)
			$file->unlink();
		$directory->rmdir();

		return true;
	}
	return false;
}