Closes #40874

Release Notes:

- Fixed an issue where migrating settings after v0.208.5+ would
spuriously enable prettier. This fix only affects those who have not
updated or migrated yet. For those who have already updated to version
v0.208.5 or later, placing `"formatter": []` in your settings in the
affected languages will fix the issue.

---------

Co-authored-by: Mikayla <mikayla@zed.dev>