@Maintenance_bot went to remove the infamous Patch-For-Review tag on the old task T137973#9999757 and upon receiving the notification I noticed it already removed some old deployment tags:
I have asked the bot operator (Amir) who states about the bot:
It removes patch for review. I assume somehow phabricator removes others too. I haven't made any specific change on how it works
So my guess is Phabricator is being smart and automagically remove archived project. I don't know if it always did that, but that is the first time I notice so maybe that is a change from a recent upgrade. Overall, I think archived projects should be left untouched but I am archeologist freak.

