- colorizer.py: stestr (and ostestr) can be used instead,
as they include its code;
- enable-pre-commit-hook.sh: no references in the documentation,
it looks like a relic;
- with_venv.sh: its only usage was removed when run_tests.sh
was removed, and it's being phased out from other repositories
as well.
Change-Id: I566f893ae754687555fb3c4cb581e1b8a4eed95d
29bb1f7b4a