* Don't use fdatasync since it doesn't work on Snow Leopard.

* Don't refer to config.h in util.hh, because config.h is not
  installed (http://hydra.nixos.org/build/303053).

src/libutil/util.hh

@@ -1,8 +1,6 @@
 #ifndef __UTIL_H
 #define __UTIL_H
 
-#include "config.h"
-
 #include "types.hh"
 
 #include <sys/types.h>
@@ -12,10 +10,6 @@
 
 #include <cstdio>
 
-#ifndef HAVE_FDATASYNC
-#define fdatasync fsync
-#endif
-
 
 namespace nix {