code: func deletefiles(path string, f os.FileInfo, err error) error {
  	if strings.HasSuffix(f.Name(), ".vhdx") {
  		logrus.Warnf("lcowdriver: init: deleting stale scratch file %s", path)
  		return os.Remove(path)
  	}
  	return nil
  }
docs: // deletefiles is a helper function for initialisation where we delete any
  // left-over scratch files in case we were previously forcibly terminated.