docs: def clean_up(group, identifier, date):
      """Delete all of a groups local mbox, index, and state files.
  
      :type group: str
      :param group: group name
  
      :type identifier: str
      :param identifier: the identifier for the given group.
  
      :rtype: bool
      :returns: True
  
      """
      #log.error('exception raised, cleaning up files.')
      glob_pat = '{g}.{d}.mbox*'.format(g=group, d=date)
      for f in glob(glob_pat):
          #log.error('removing {f}'.format(f=f))
          try:
              os.remove(f)
          except OSError:
              continue
      glob_pat = '{id}_state.json'.format(id=identifier)
      for f in glob(glob_pat):
          #log.error('removing {f}'.format(f=f))
          try:
              os.remove(f)
          except OSError:
              continue
      return True