macOS

Revert "Development of 4.0.0 started." #10107

Job	Run time
make (test-bundler-parallel, macos-14)	21m 10s
make (check, macos-14)	8m 52s
make (check, macos-14, --with-gmp)	9m 17s
make (check, macos-14, --with-jemalloc --with-opt-dir=$(brew --prefix jemalloc))	9m 0s
make (test-bundled-gems, macos-14)	11m 32s
make (check, macos-15)	9m 58s
make (check, macos-14, --with-gcc=gcc-14)	14m 9s
make (test-all, --repeat-count=2, macos-14)	7m 55s
macOS result	3s
	1h 31m 56s

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