Update python-app.yml

Author: ddkohler

.github/workflows/python-app.yml

@@ -29,7 +29,8 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install flake8 pytest
-        pip install .[iontof]
+        pip install .
+        # pip install .[iontof]
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names