nodejs-5: fix on darwin

Turns out the darwin-flavored patches aren't needed anymore.

Fixes #12305

pkgs/development/web/nodejs/v5.nix

@@ -38,11 +38,8 @@ in stdenv.mkDerivation {
   dontDisableStatic = true;
   prePatch = ''
     patchShebangs .
-    sed -i 's/raise.*No Xcode or CLT version detected.*/version = "7.0.0"/' tools/gyp/pylib/gyp/xcode_emulation.py
   '';
 
-  patches = stdenv.lib.optionals stdenv.isDarwin [ ./no-xcode.patch ./pkg-libpath.patch ];
-
   buildInputs = [ python which zlib libuv openssl python ]
     ++ optionals stdenv.isLinux [ utillinux http-parser ]
     ++ optionals stdenv.isDarwin [ pkgconfig openssl libtool ];