switch to pure pytest for linux testing

Author: robertjwilson

.github/workflows/python-app.yml

@@ -43,13 +43,9 @@ jobs:
           pip install pyarrow
           pip install rioxarray
           pip install pytest
-          pip install pytest-cov
-          pip install coverage 
 
       - name: Test with pytest
         shell: bash -l {0}
         run: |
-          coverage run -m pytest tests/test*.py
-          coverage report
-          coverage xml
+          pytest tests/test*.py