ci: remove Python version comment from mac config

ci/test/00_setup_env_mac_native.sh

@@ -6,8 +6,6 @@
 
 export LC_ALL=C.UTF-8
 
-# Homebrew's python@3.12 is marked as externally managed (PEP 668).
-# Therefore, `--break-system-packages` is needed.
 export CONTAINER_NAME="ci_mac_native"  # macos does not use a container, but the env var is needed for logging
 export PIP_PACKAGES="--break-system-packages zmq"
 export GOAL="install deploy"