kwin: Remove syncobj patch

Useless because lot of application run with XWayland and is already patched for NVIDIA 555

modules/system/desktop/plasma/default.nix

@@ -33,10 +33,5 @@ in
       glxinfo
       clinfo
     ];
-
-    # Uncomment when kwin is available in nixpkgs and NVIDIA 555
-    nixpkgs.overlays = [
-      (import ../../../../overlays/kwin)
-    ];
   };
-}
+}

overlays/kwin/default.nix

@@ -1,9 +0,0 @@
-self: super: {
-  kdePackages = super.kdePackages.overrideScope (kde-self: kde-super: rec {
-    kwin = kde-super.kwin.overrideAttrs (oldAttrs: rec {
-      patches = oldAttrs.patches ++ [
-        ./5511.patch # https://invent.kde.org/plasma/kwin/-/merge_requests/5511
-      ];
-    });
-  });
-}