Remove unused runtime flag on macOS #2938

Job	Run time
lint / clang-format	12s
lint / python-lint	8s
windows / windows-clang-build	2m 45s
ubuntu / ubuntu-gcc-build (ubuntu-24.04)	1m 6s
windows / windows-msvc-build-debug	5m 55s
ubuntu / ubuntu-gcc-build-debug (ubuntu-24.04)	1m 42s
mac / macos-clang-build-debug	2m 35s
windows / windows-msvc-build	7m 6s
ubuntu / ubuntu-clang-build (ubuntu-24.04)	2m 17s
mac / macos-clang-build	3m 7s
ubuntu / ubuntu-gcc-build (ubuntu-24.04-arm)	3m 28s
ubuntu / ubuntu-clang-build (ubuntu-24.04-arm)	2m 55s
windows / windows-clang-test	1m 33s
mac / macos-clang-test	3m 4s
ubuntu / ubuntu-gcc-test (ubuntu-24.04)	5m 17s
ubuntu / ubuntu-gcc-test (ubuntu-24.04-arm)	5m 6s
mac / macos-clang-test-extended	2m 26s
windows / windows-clang-test-extended	1m 18s
ubuntu / ubuntu-clang-sanitizer-build (ubuntu-24.04)	1m 24s
ubuntu / ubuntu-clang-test (ubuntu-24.04)	6m 15s
ubuntu / ubuntu-clang-test (ubuntu-24.04-arm)	6m 39s
windows / windows-msvc-test	2m 14s
ubuntu / ubuntu-clang-sanitizer-test (ubuntu-24.04)	2m 1s
ubuntu / ubuntu-gcc-test-extended (ubuntu-24.04)	2m 37s
ubuntu / ubuntu-gcc-test-extended (ubuntu-24.04-arm)	3m 29s
windows / windows-msvc-test-extended	1m 26s
ubuntu / ubuntu-clang-test-extended (ubuntu-24.04)	4m 28s
ubuntu / ubuntu-clang-test-extended (ubuntu-24.04-arm)	4m 23s
ubuntu / ubuntu-clang-sanitizer-test-extended (ubuntu-24.04)	1m 38s
ubuntu / ubuntu-gcc-build-codecov	3m 47s
perf / ubuntu-gcc-build-perf-stats	1m 44s
	1h 34m 5s

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