Update python-app.yml

.github/workflows/python-app.yml

@@ -27,9 +27,6 @@ jobs:
       uses: snok/install-poetry@v1        
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip
-        pip install flake8 pytest
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
         poetry install
     # - name: Get latests
     #   run: |