remove unittest install

Author: molly-moen

.github/workflows/python-package.yml

@@ -27,7 +27,6 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install unittest
         # python -m pip install flake8 pytest
         # if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
     # - name: Lint with flake8