Remove setup.py

[ssbarnea]

Includes upgrading the packaging testing.

[karcaw]

I needed that.. But i worked around it.. we had been installing with this in our pip line:
git+https://github.com/ansible-community/molecule-vagrant.git@main#egg=molecule-vagrant for some time now, and that broke..

switching back to just molecule-vagrant in the pip line works.

Just putting this here so other may find it someday...