Remove to update the docs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/tags/RELEASE_29@129055 91177308-0d34-0410-b5e6-96231b3b80d8

final/autoconf/m4/header_mmap_anonymous.m4

@@ -1,21 +0,0 @@
-#
-# Check for anonymous mmap macros.  This is modified from
-# http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_have_ext_slist.html
-#
-AC_DEFUN([AC_HEADER_MMAP_ANONYMOUS],
-[AC_CACHE_CHECK(for MAP_ANONYMOUS vs. MAP_ANON,
-ac_cv_header_mmap_anon,
-[ AC_LANG_PUSH([C])
-  AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
-    [[#include <sys/mman.h>
-#include <unistd.h>
-#include <fcntl.h>]],
-  [[mmap (0, 1, PROT_READ, MAP_ANONYMOUS, -1, 0); return (0);]])],
-  ac_cv_header_mmap_anon=yes, 
-  ac_cv_header_mmap_anon=no)
-  AC_LANG_POP([C])
-])
-if test "$ac_cv_header_mmap_anon" = yes; then
-   AC_DEFINE([HAVE_MMAP_ANONYMOUS],[1],[Define if mmap() uses MAP_ANONYMOUS to map anonymous pages, or undefine if it uses MAP_ANON])
-fi
-])