Remove rubocop and msftidy touchpoints

Rubocop replaces the default YAML library which makes development
testing difficult. It does not cause problems on Travis, but according
to reports, it does cause instability with many individual dev
environments.

While I would love to have a more solid source of this bug report, right
now this was an oral report from @shuckins-r7 (who I tend to believe a
lot).

I would of course rather fix the underlying problem, but since Rubocop is still experimental, it can be safely removed and re-added later when this bug is validated and either fixed or worked around.