pantheon.gnome-bluetooth-contract: mark as broken

Sendto device selection is removed in gnome-bluetooth 42.
I decide it is not worth to maintain a legacy gnome-bluetooth
package for the contract.
This should also be broken in elementary OS 7.

nixos/modules/services/x11/desktop-managers/pantheon.nix

@@ -302,7 +302,6 @@ in
       environment.systemPackages = with pkgs.pantheon; [
         contractor
         file-roller-contract
-        gnome-bluetooth-contract
       ];
 
       environment.pathsToLink = [

pkgs/desktops/pantheon/desktop/gnome-bluetooth-contract/default.nix

@@ -49,5 +49,8 @@ stdenv.mkDerivation rec {
     license = licenses.gpl3Plus;
     maintainers = teams.pantheon.members;
     platforms = platforms.linux;
+    # sendto device selection is removed in gnome-bluetooth 42
+    # https://github.com/elementary/gnome-bluetooth-contract/issues/1
+    broken = true;
   };
 }