Update python-package.yml

.github/workflows/python-package.yml

@@ -23,8 +23,6 @@ jobs:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip
-        pip install unittest
         if [ "${{ matrix.python-version }}" == "3.2" ]; then
           pip install coverage==3.7.1
         else