Drop caching the tox env when Python is installed via conda

.github/workflows/osx_startup.yaml

@@ -34,20 +34,11 @@ jobs:
           node-version: '18.12.1'
           cache: 'yarn'
           cache-dependency-path: 'galaxy root/client/yarn.lock'
-      - name: Get full Python version
-        id: full-python-version
-        shell: bash
-        run: echo "version=$(python -c 'import sys; print("-".join(str(v) for v in sys.version_info))')" >> $GITHUB_OUTPUT
       - name: Cache pip dir
         uses: actions/cache@v4
         with:
           path: ~/Library/Caches/pip
           key: pip-cache-${{ matrix.python-version }}-${{ hashFiles('galaxy root/requirements.txt') }}
-      - name: Cache tox env
-        uses: actions/cache@v4
-        with:
-          path: .tox
-          key: tox-cache-${{ runner.os }}-${{ steps.full-python-version.outputs.version }}-${{ hashFiles('galaxy root/requirements.txt') }}-osx
       - name: Install miniforge  # use this job to test using Python from a conda environment
         uses: conda-incubator/setup-miniconda@v3
         with: