On Stack Exchange sites, there's an an automatic process to delete abandoned closed questions. Area 51 often has a lot of closed proposals that receive no activity for a long time. Area 51 is fairly outdated and doesn't have a help center like other sites in the network, so I can't tell if roomba applies here too. I also can't view deleted proposals, so I can't see if most proposals are automatically deleted or manually deleted.
So, is there an automatic process to remove closed Area 51 proposals like roomba on other sites, or do closed proposals have to be manually removed?