Remove the internal group ID setting
While working on #1716 (closed), I found that we still had a internal_group_id configuration option, which was left here to run a migration that we have since deleted in !2007 (merged).
While working on #1716 (closed), I found that we still had a internal_group_id configuration option, which was left here to run a migration that we have since deleted in !2007 (merged).