Remove venv

Author: BewareMyPower

.github/workflows/ci-pr-validation.yaml

@@ -171,7 +171,6 @@ jobs:
 
       - name: Build and test Mac wheels
         run: |
-          source venv/bin/activate
           pkg/mac/build-mac-wheels.sh ${{matrix.py.version}} ${{matrix.py.version_long}}
 
   windows-wheels: