Update .github/workflows/python-app.yml

Co-authored-by: Martin Morgenstern <martinmo@users.noreply.github.com>
Signed-off-by: anjastrunk <119566837+anjastrunk@users.noreply.github.com>

.github/workflows/python-app.yml

@@ -28,7 +28,7 @@ jobs:
         python -m pip install --upgrade pip
         # pip install flake8 pytest
         pip install pytest
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+        pip install -r requirements.txt
     #- name: Lint with flake8
     #  run: |
     #    # stop the build if there are Python syntax errors or undefined names