docs: def del_feed(name):
      """remove from database (and delete aliases)"""
      with Database("aliases") as aliases, Database("feeds") as feeds:
          if aliases[name]:
              proper_name = aliases[name]
          elif feeds[name]:
              proper_name = feeds[name]
          for k, v in aliases:
              if v == proper_name:
                  del aliases[k]
          # deleted from aliases
          del feeds[proper_name]