Cleanup doesn't clean up the export directory

[iainlane]

I just dropped powerpc from the zesty config, because it's deleted in the archive. The output files are still there, just not updated any more.

I wonder if asgen could take care of cleaning up the output directory? That is - delete everything in there that isn't either currently being updated or immutable.

Good idea or bad?

[ximion]

Good idea, I think - originally I intentionally didn't clean up that stuff because it might still be useful, but since we automatically clean up data in the media/ directory as well I think not removing the exported YAML/XML is the actual unexpected result.