Revert "Correct mac toolchain date/note field"

This reverts commit 3dec5ef20f2cde2f1cfbe9d201e478b5dc67c3c8.
Revert "correct date/note fields for m4"

This reverts commit 3f3a12fd2dbeb29660c2a6c110e708d98c5a5486.
Revert "Add m4 builds"

This reverts commit 6b4e40964ebd9a92afb3ce75a6deea03f63f5df1.