Drop the Test PyPI step

Trusted publishing to test.pypi.org needs its own registration on that site, a
separate one from PyPI's. Without it the step fails, and since it ran before the
real publish it would block the release. For a package that releases rarely it
is not worth the second registration.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: paulsaxe

.github/workflows/Release.yaml

@@ -148,11 +148,5 @@ jobs:
         python -m build --sdist --wheel --outdir dist/
         ls -l dist/
         
-    - name: Publish distribution 📦 to Test PyPI
-      uses: pypa/gh-action-pypi-publish@release/v1
-      with:
-        repository-url: https://test.pypi.org/legacy/
-        skip-existing: true
-
     - name: Publish distribution 📦 to PyPI
       uses: pypa/gh-action-pypi-publish@release/v1