Revert the field-write denial example edit

The example is a partial dump of the thrown error (it lists no
developerMessage either), so it states nothing false without status. The
docs sweep finds no sentence this change makes false.

Claude-Session: https://claude.ai/code/session_01DiCSbmJrkzNhuEAier4VoJ
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude

content/docs/permissions/field-level-security.mdx

@@ -55,7 +55,6 @@ names in `details.forbiddenFields`:
 {
   "name": "PermissionDeniedError",
   "code": "PERMISSION_DENIED",
-  "status": 403,
   "statusCode": 403,
   "message": "[Security] Field write denied: not permitted to edit [salary, ssn] on 'employee'",
   "details": {