mcfgthreads: 9570e5ca -> 10y2x3x6

The latest version non longer has `-Werror` (at our request; thanks!) so
we no longer need to patch it out.

pkgs/os-specific/windows/mcfgthreads/default.nix

@@ -7,8 +7,8 @@ stdenv.mkDerivation {
   src = fetchFromGitHub {
     owner = "lhmouse";
     repo = "mcfgthread";
-    rev = "9570e5ca7b98002d707c502c919d951bf256b9c6";
-    sha256 = "10y2x3x601a7c1hkd6zlr3xpfsnlr05xl28v23clf619756a5755";
+    rev = "c446cf4fcdc262fc899a188a4bb7136284c34222";
+    sha256 = "1ib90lrd4dz8irq4yvzwhxqa86i5vxl2q2z3z04sf1i8hw427p2f";
   };
 
   outputs = [ "out" "dev" ];
@@ -18,10 +18,6 @@ stdenv.mkDerivation {
     rm -r "$sourceRoot/debug" "$sourceRoot/release"
   '';
 
-  postPatch = ''
-    substituteInPlace Makefile.am --replace '-Werror' ""
-  '';
-
   nativeBuildInputs = [
     autoreconfHook
   ];