yuzu: drop vulkan-headers override

We have a new enough one by default now

pkgs/applications/emulators/yuzu/default.nix

@@ -1,4 +1,4 @@
-{ qt6Packages, makeScopeWithSplicing', generateSplicesForMkScope, vulkan-headers, fetchFromGitHub }:
+{ qt6Packages, makeScopeWithSplicing', generateSplicesForMkScope }:
 
 makeScopeWithSplicing' {
   otherSplices = generateSplicesForMkScope "yuzuPackages";
@@ -8,15 +8,5 @@ makeScopeWithSplicing' {
 
     mainline = self.callPackage ./mainline.nix {};
     early-access = self.callPackage ./early-access {};
-
-    vulkan-headers = vulkan-headers.overrideAttrs(old: rec {
-      version = "1.3.274";
-      src = fetchFromGitHub {
-        owner = "KhronosGroup";
-        repo = "Vulkan-Headers";
-        rev = "v${version}";
-        hash = "sha256-SsS5VlEnhjOSu8MlIVC0d2r2EAf8QsNJPEAXNtbDOJ4=";
-      };
-    });
   };
 }