chore: remove cache entry in workflow

.github/workflows/build.yml

@@ -21,12 +21,6 @@ jobs:
         run: python -m poetry install -v
         env:
           POETRY_VIRTUALENVS_IN_PROJECT: true
-
-      - name: Cache the virtualenv
-        uses: actions/cache@v2
-        with:
-          path: ./.venv
-          key: ${{ runner.os }}-venv-${{ hashFiles('**/poetry.lock') }}
 
       - name: Run pytest
         run: |