[rfa] delete more mmalloc remnants

[Andrew Cagney]

> I agree with anything user visible being removed.  For the remaining 
>> internal stuff perhaphs hold off a little.
> 
> 
> Ummm, could you say which of these files/symbols it's okay to
> delete now:
> 
>   * MAINTAINERS: Delete mmalloc.
>   * Makefile.in: Delete MMALLOC, MMALLOC_CFLAGS, -lmmalloc, mmalloc_h.
>   * NEWS: Mention removal of --with-malloc.
>   * acconfig.h: Delete USE_MMALLOC, MMCHECK_FORCE.
>   * config.in: Regenerate.
>   * configure: Regenerate.
>   * configure.in: Delete MMALLOC_CFLAGS, MMALLOC, --with-mmalloc, USE_MMALLOC, MMCHECK_FORCE.
>   * gdbinit.in: Remove mmalloc.
>   * utils.c: Delete USE_MMALLOC, NO_MMCHECK, MMCHECK_FORCE, malloc_botch.
>   * config/alpha/alpha-linux.mh: Delete MMALLOC, MMALLOC_CFLAGS.
>   * config/i386/go32.mh: Likewise.
>   * config/i386/interix.mh: Likewise.
>   * config/powerpc/xm-linux.h: Delete MMAP_BASE_ADDRESS, MMAP_INCREMENT.
> 
> I'll be happy to make a revised patch with just the stuff that
> it's okay to delete.

Yep.

Andrew