refactor(admin): remove legacy menu editor

src/lib/admin-nav-config.test.ts

@@ -64,10 +64,7 @@ describe("admin-nav-config", () => {
 			hiddenItems: ["/admin/photos", "/admin", "/admin/menu"],
 		});
 		expect(applied.map((g) => g.labelKey)).toEqual(["overview", "content"]);
-		expect(applied[0]?.items.map((i) => i.href)).toEqual([
-			"/admin",
-			"/admin/menu",
-		]);
+		expect(applied[0]?.items.map((i) => i.href)).toEqual(["/admin"]);
 		expect(applied[1]?.items.map((i) => i.href)).toEqual(["/admin/articles"]);
 		expect(ADMIN_NAV_PINNED_HREFS.has("/admin")).toBe(true);
 	});