Upgrade CI caching setup

.github/workflows/ci.yaml

@@ -30,21 +30,11 @@ jobs:
         uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python }}
+          cache: 'pip'
 
       - name: Upgrade bootstrap packages
         run: python -m pip install --upgrade pip tox
 
-      - name: Get pip cache dir
-        id: pip-cache
-        run: echo "::set-output name=dir::$(pip cache dir)"
-
-      - name: Cache pip
-        uses: actions/cache@v3
-        with:
-          path: ${{ steps.pip-cache.outputs.dir }}
-          key: pip-${{ runner.os }}-${{ matrix.python }}-${{ hashFiles('setup.py') }}
-          restore-keys: pip-${{ runner.os }}-${{ matrix.python }}-
-
       - name: Set Python version
         # See https://pre-commit.com/#github-actions-example
         run: echo "PY=$(python -VV | sha256sum | cut -d' ' -f1)" >> $GITHUB_ENV