refactor(housekeeping): adopt ase route namespace

src/app/admin-next/layout.tsx

@@ -1,17 +0,0 @@
-import { notFound } from "next/navigation";
-import type { ReactNode } from "react";
-import { env } from "@/env";
-import { isHousekeepingPreviewEnabled } from "@/features/housekeeping/foundation/preview-gate";
-
-export default function AdminNextLayout({ children }: { children: ReactNode }) {
-	if (
-		!isHousekeepingPreviewEnabled({
-			nodeEnv: env.NODE_ENV,
-			flag: env.HOUSEKEEPING_NEXT_PREVIEW_ENABLED,
-		})
-	) {
-		notFound();
-	}
-
-	return children;
-}