0f741cef28
f-trycua's #50855 test file predated the cross-platform PR (#50552) and reintroduced two stale tests asserting Linux is unsupported (test_*_non_macos_*, patching platform.system="Linux" and expecting a no-op/warn). Linux + Windows are supported now, so install proceeds on those platforms. Restore main's cross-platform-correct versions: test_*_on_unsupported_platform_* using FreeBSD as the genuinely unsupported case.