Keybase adds a folder to my Finder favorites that I cannot remove. I've checked the Keybase issues database and this appears to be a known but still not addressed issue, so I think I need to (1) stop using Keybase and (2) fix this in the Finder.

How do I do (2): how do I force the removal of an item from my Finder Favorites that I cannot remove in the normal way (using the items menu or dragging out of the sidebar)?