docs: def marvcli_cleanup(ctx, discarded, unused_tags):
      """Cleanup unused tags and discarded datasets."""
      if not any([discarded, unused_tags]):
          click.echo(ctx.get_help())
          ctx.exit(1)
  
      site = create_app().site
  
      if discarded:
          site.cleanup_discarded()
  
      if unused_tags:
          site.cleanup_tags()
          site.cleanup_relations()