Update python-app.yml

.github/workflows/python-app.yml

@@ -27,8 +27,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install flake8 pytest
-        pip install pandas
-        if [ -f \src\requirements.txt ]; then pip install -r \src\requirements.txt; fi
+        pip install -r src\requirements.txt
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names