message: python-setup: Remove outdated comment
diff: #! /usr/bin/pwsh
  -# while waiting for the next release of `virtualenv` after v20.16.5, we install an older
  -# version of `setuptools` to ensure that binaries are always put under
  -# `<venv-path>/bin`, which wouldn't always happen with the GitHub actions version of
  -# Ubuntu 22.04. See https://github.com/github/codeql-action/issues/1249
  py -2 -m pip install --user --upgrade pip setuptools wheel
  py -3 -m pip install --user --upgrade pip setuptools wheel
  