Time to svn rm include/malloc.h

[Warner Losh]

We started warning in 1994 that malloc.h was an obsolete relic of a bygon
era. It was almost removed from FreeBSD 2.0. It's time to remove it because
it causes more harm than good to ports these days. 25 years of advance
warning should be enough, I'd say.

To that end, I plan on removing it from -current on April 15th.

Is there any reason I shouldn't do this?

Warner