intel-gmmlib: remove myself as maintainer

I currently do not have any Intel GPUs hooked up to displays, so it is
hard to verify changes.

pkgs/development/libraries/intel-gmmlib/default.nix

@@ -20,6 +20,5 @@ stdenv.mkDerivation rec {
     license = licenses.mit;
     description = "Intel Graphics Memory Management Library";
     platforms = [ "x86_64-linux" ];
-    maintainers = with maintainers; [ danieldk ];
   };
 }