Uncomment flake8 part of build in workflow

.github/workflows/python-app.yml

@@ -25,9 +25,9 @@ jobs:
         python -m pip install --upgrade pip
         pip install flake8 pytest
         if [ -f requirements-dev.txt ]; then pip install -r requirements-dev.txt; fi
-#    - name: Lint with flake8
-#      run: |
-#        # stop the build if there are Python syntax errors or undefined names
-#        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
-#        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-#        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+    - name: Lint with flake8
+      run: |
+        # stop the build if there are Python syntax errors or undefined names
+        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
+        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics