Currently on wikis where it isn't configured (e.g. mediawiki.org) you get a very empty Citoid dialog:
|Resolved||Release||dduvall||T206678 1.33.0-wmf.24 deployment blockers|
|Resolved||Mvolz||T219510 Citoid should only usurp "<ref" / ctrl+shift+k shortcuts if configured|
I checked this locally, and the merged change disables citoid even if the automatic tab is correctly configured. I don't think this is the correct behaviour; if neither are configured, it should be de-registered, but not cite tools missing alone: it should also check that Mediawiki:Citoid-template-type-map.json doesn't exist as well.
I'm not 100% it's worth holding the train over - it'll disable citoid on at least one small language wiki. But the fix isn't done yet, no. Alternatively we can just revert it but note it requires reverting the change in the cite extension as well.