docs: def _remove_files(files):
      """
      Remove all given files.
  
      Args:
          files (list): List of filenames, which will be removed.
      """
      logger.debug("Request for file removal (_remove_files()).")
  
      for fn in files:
          if os.path.exists(fn):
              logger.debug("Removing '%s'." % fn)
              os.remove(fn)