CI: remove redundant step

Author: tacaswell

.github/workflows/main.yaml

@@ -76,13 +76,6 @@ jobs:
           name: diffs
           path: |
             diffs/
-      - name: Output artifacts URL
-        run: |
-          echo 'Artifact URL:' \
-            '${STEPS_DIFFS_ARTIFACT_UPLOAD_OUTPUTS_ARTIFACT_URL}' \
-            >> $GITHUB_STEP_SUMMARY
-        env:
-          STEPS_DIFFS_ARTIFACT_UPLOAD_OUTPUTS_ARTIFACT_URL: ${{ steps.diffs-artifact-upload.outputs.artifact-url }}
       - name: Publish cheatsheets and handouts
         if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
         uses: peaceiris/actions-gh-pages@4f9cc6602d3f66b9c108549d475ec49e8ef4d45e # v4.0.0