New review comment by ahesford on void-packages repository

https://github.com/void-linux/void-packages/pull/40569#discussion_r1028532386

Comment:
The majority of projects I've seen in our repo silently do nothing with `python3 setup.py test` besides print a deprecation warning. If dropping support for this case highlights more overlooked tests than keeping it does, it's the right thing to do. We can always add back `python3 setup.py test` in manual `do_check` overrides in the templates that still rely on this behavior if the set isn't too large.