https://github.com/mesonbuild/meson/compare/0.55.0...0.55.1 setuptools have been removed from runtime dependencies: https://github.com/mesonbuild/meson/pull/7461
https://github.com/mesonbuild/meson/compare/0.54.1...0.54.2
See comment in code and the PR it references, https://github.com/mesonbuild/meson/pull/6827, for details. We can remove entries from the cross file because they will be gotten from env vars now.