Remove all old dependencies and code from the refactor branch

assigned to @robinwilliam.hundt

added Assigned and removed Needs assignment labels

added Blocking label

Depends on #46 (closed). Dependency of #47 (closed).

Or is this issue already done?

added Doing and removed Assigned labels

added review and removed Doing labels

I think with the pre-commit remaining legacy code has been purged.

closed