Remove tox requirement

.github/workflows/tests.yml

@@ -27,7 +27,6 @@ jobs:
         python -m pip install --upgrade pip
         pip install -r requirements.txt
         pip install -r requirements_test.txt
-        pip install tox tox-gh-actions
     - name: Tests
       run: |
-        tox -r
+        pytest --timeout=30 --durations=10 --cov=blinkpy --cov-report term-missing