ci: remove TestPyPI publish from PRs to avoid version conflicts, only publish to PyPI from main/releases

Author: devinslick

.github/workflows/publish.yml

@@ -1,12 +1,9 @@
 name: Publish Python Package
 
 # Trigger on:
-#  - pull requests targeting main (publish to TestPyPI for validation before merge)
 #  - pushes to main (publish to PyPI after merge)
-#  - published GitHub Releases (keep existing behavior for canonical releases)
+#  - published GitHub Releases (publish to PyPI for versioned releases)
 on:
-  pull_request:
-    branches: [main]
   push:
     branches: [main]
   release:
@@ -44,32 +41,6 @@ jobs:
           name: python-package-distributions
           path: dist/
 
-  # Publish from pull requests to main -> TestPyPI
-  publish_testpypi:
-    name: Publish to TestPyPI (PR to main)
-    runs-on: ubuntu-latest
-    needs: build_sdist_and_wheel
-    # Only run for pull request events targeting main
-    if: github.event_name == 'pull_request' && github.base_ref == 'main'
-    environment: testpypi
-    permissions:
-      id-token: write
-      contents: read
-
-    steps:
-      - name: Download dists
-        uses: actions/download-artifact@v4
-        with:
-          name: python-package-distributions
-          path: dist/
-
-      - name: Publish package distributions to TestPyPI
-        uses: pypa/gh-action-pypi-publish@release/v1
-        with:
-          # repository-url directs upload to TestPyPI
-          repository-url: https://test.pypi.org/legacy/
-          skip-existing: true
-
   # Publish from pushes to main OR when a Release is published -> Production PyPI
   publish_pypi:
     name: Publish to PyPI (main branch or GitHub Release)