Fix for with-clerk example (#24324)

## Bug

- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added

## Feature

- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.

## Documentation / Examples

- [x] Make sure the linting passes

The predev npm script assumes that vercel cli is installed. It's better for the example to run without it.

examples/with-clerk/package.json

@@ -1,7 +1,6 @@
 {
   "name": "with-clerk",
   "scripts": {
-    "predev": "([[ -d .vercel ]] || vercel link) && vercel env pull .env.local",
     "dev": "next dev",
     "build": "next build",
     "start": "next start"
@@ -13,8 +12,5 @@
     "react": "17.0.1",
     "react-dom": "17.0.1"
   },
-  "devDependencies": {
-    "vercel": "^21.3.3"
-  },
   "license": "MIT"
 }