ci: Remove unnecessary debug output.

Downloaded dists can also be traced via the artifacts in the pipeline.

Author: seifertm

.github/workflows/main.yml

@@ -260,9 +260,6 @@ jobs:
       with:
         name: dist
         path: dist
-    - name: Collected dists
-      run: |
-        tree dist
     - name: PyPI upload
       uses: pypa/gh-action-pypi-publish@cef221092ed1bacb1cc03d23a2d87d1d172e277b  # v1.14.0
     - name: Publish GitHub Release