* The postHook substitution is not used anywhere, so get rid of it.

svn path=/nixpkgs/branches/stdenv-updates/; revision=31702

pkgs/misc/my-env/default.nix

@@ -48,8 +48,6 @@ mkDerivation {
   phases = [ "buildPhase" ];
   setupNew = substituteAll {
     src = ../../stdenv/generic/setup.sh;
-    preHook="";
-    postHook="";
     initialPath= (import ../../stdenv/common-path.nix) { inherit pkgs; };
     gcc = stdenv.gcc;
   };