fix build errors

Author: robkooper

.github/workflows/ci.yaml

@@ -22,14 +22,13 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install flake8 pytest pipenv
-        pipenv run pip freeze > requirements.txt
         pip install -r requirements.txt
 
     - 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
+        # exit-zero treats all errors as warnings.
         flake8 . --count --exit-zero --max-complexity=10 --max-line-length=120 --statistics
 
     - name: Test with pytest