enable warning red flags also on Linux

Author: slayoo

.github/workflows/tests+artifacts+pypi.yml

@@ -69,11 +69,13 @@ jobs:
 
       - run: pytest -v -s -We -p no:unraisableexception tests
 
-      - if: matrix.platform != 'ubuntu-latest'
-        run: |
+      - run: |
           python -m build 2>&1 | tee build.log
           exit `fgrep -i warning build.log | wc -l`
 
+      - if: matrix.platform == 'ubuntu-latest'
+        run: rm dist/*
+
       - if: matrix.platform != 'ubuntu-latest'
         uses: actions/upload-artifact@v2
         with: