If we can't delete
rust-unofficial, I think it probably makes sense to wait until we have a more formal idea of "what belongs in
rust-lang" before moving
Spitballing some "necessary conditions" for migration:
too-many-lists, I'm guessing the aforementioned ex-docs member has already been consulted?
rust-langteam, we are willing to give them sufficient access to continue contributing at the same level (not sure how easy or difficult it will be to flesh out this condition)