fix upload to pypi.org

Don't specify a pypi repository. Use the default one. This allows the move to pypi.org to work.

Upload failed (410): Gone (This API has been deprecated and removed from legacy PyPI in favor of using the APIs available in the new PyPI.org implementation of PyPI (located at https://pypi.org/)..) For more information about migrating your use of this API to PyPI.org, please see https://packaging.python.org/guides/migrating-to-pypi-org/#uploading. For more information about the sunsetting of this API, please see https://mail.python.org/pipermail/distutils-sig/2017-June/030766.html))

and on that 2nd link...

delete the line starting withrepositoryand you will use your upload tool’s default URL.