Revert "release.yml: in Ubuntu 24.04 runners setuptools has to be installed manually"

This reverts commit c53782a.

But into the release virtualenv, not here (see the next commit).

Author: wferi

.github/workflows/release.yml

@@ -10,7 +10,7 @@ jobs:
     - uses: actions/checkout@v3
     - run: |
         sudo apt-get install python3-venv make
-        pip3 install --upgrade pip wheel twine setuptools
+        pip3 install --upgrade pip wheel twine
     - run: make release
     - run: make release-test
     - name: Publish a Python distribution to PyPI