clean up publishing

[JayBazuzi]

From .github/workflows/publish.yml:

      - name: Build and publish approval_utilities
        env:
            TWINE_USERNAME: __token__
            TWINE_PASSWORD: ${{ secrets.PYPI_APPROVAL_UTILITIES }}
        run: |
          ./publish_approval_utilities.sh
      - name: Build and publish approvaltests
        env:
          TWINE_USERNAME: __token__
          TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
        run: |
          python setup.publish.py sdist bdist_wheel
          twine upload --repository-url https://upload.pypi.org/legacy/ dist/*
          rm -r dist

• These are different but should be the same
• These depend on unpinned versions of 3rd-party modules
• Use tox
• Delete redundant cruft from Deploy.Readme.md