Update qc.yml

Try having tox do everything

.github/workflows/qc.yml

@@ -51,13 +51,6 @@ jobs:
           virtualenvs-create: true
           virtualenvs-in-project: true
       - name: Install tox
-        run: pip install tox tox-gh-actions
+        run: pip install tox
       - name: Run Doctests
-        run: poetry run tox -e doctest
-      - name: Generate coverage results
-        run: |
-          poetry run pip install -U pytest coverage
-          poetry run coverage run -p -m pytest tests/
-          poetry run coverage combine
-          poetry run coverage xml
-          poetry run coverage report -m
+        run: poetry run tox