I had an old server going away, and it was removed and wiped before I
had a chance to remove DS from it, clearing it out of our tree
properly. I now have a server looking for it, (the box removed did
not have a replica so only 1 server is looking for it) and I have some
other servers to remove but don't want to do so until I clear out the
phantom server I have now.

Any best practices on how to delete a server from a tree a server
that's been removed and re-formatted?