test: remove redundant default rich-menu command smoke case

src/line/rich-menu.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from "vitest";
-import { createGridLayout, messageAction, createDefaultMenuConfig } from "./rich-menu.js";
+import { createGridLayout, messageAction } from "./rich-menu.js";
 
 describe("createGridLayout", () => {
   it("creates a 2x3 grid layout for tall menu", () => {
@@ -64,14 +64,3 @@ describe("createGridLayout", () => {
     expect((areas[5].action as { text: string }).text).toBe("/contact");
   });
 });
-
-describe("createDefaultMenuConfig", () => {
-  it("has expected default commands", () => {
-    const config = createDefaultMenuConfig();
-
-    const commands = config.areas.map((a) => (a.action as { text: string }).text);
-    expect(commands).toContain("/help");
-    expect(commands).toContain("/status");
-    expect(commands).toContain("/settings");
-  });
-});