Revert "ci: test upload to test.pypi.org"

We're ready to upload to real pypi.org now.

This reverts commit 129992f.

Author: lgarrison

.github/workflows/tests.yml

@@ -137,5 +137,3 @@ jobs:
         path: dist
 
     - uses: pypa/gh-action-pypi-publish@release/v1
-      with:
-        repository-url: https://test.pypi.org/legacy/