[arch-dev-public] Killing [unstable] for good

Any qualms about killing [unstable] from our FTP completely? We still have the directories and the "empty" databases sitting around. I think we've given plenty of warning to people that unstable no longer exists. At the very least, I'd rather have empty directories than the leftover databases we have there now that are sometimes breaking pacman because of the lone ./ entry inside of them. -Dan