Remove deprecated flag (testing)

Author: delfanbaum

.github/workflows/workflow.yaml

@@ -25,7 +25,7 @@ jobs:
           virtualenvs-in-project: true
           installer-parallel: true
 
-      - run: poetry config installer.modern-installation false
+      # - run: poetry config installer.modern-installation false
 
       - name: Load cached venv if possible
         id: cached-poetry-dependencies