Update tests

.github/workflows/python-package.yml

@@ -37,13 +37,12 @@ jobs:
           powershell
         cache-environment: true
         post-cleanup: 'all'
-    - name: Install dependencies
+    - name: Install flake8 and pytest
       run: |
         python -m pip install --upgrade pip
         python -m pip install flake8 pytest
         python -m pip install flake8 pytest-cov
         python -m pip install -e .
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names