test: remove express-4 (#24)

Author: chenjiahan

babel.config.js

@@ -62,7 +62,6 @@
     "del-cli": "^6.0.0",
     "execa": "^5.1.1",
     "express": "^5.1.0",
-    "express-4": "npm:express@^4",
     "fastify": "^5.2.1",
     "file-loader": "^6.2.0",
     "finalhandler": "^2.1.0",

package.json

@@ -8,7 +8,6 @@ import { serve } from "@hono/node-server";
 import { Stats } from "@rspack/core";
 import connect from "connect";
 import express from "express";
-import expressOld from "express-4";
 import fastify from "fastify";
 import finalhandler from "finalhandler";
 import { Hono } from "hono";
@@ -373,7 +372,6 @@ function parseHttpDate(date) {
 describe.each([
   ["connect", connect],
   ["express", express],
-  ["express-v4", expressOld],
   ["router", router],
   ["fastify", fastify],
   ["koa", koa],