Update doc/api/worker_threads.md

Co-authored-by: Antoine du Hamel <duhamelantoine1995@gmail.com>

Author: fisker

doc/api/worker_threads.md

@@ -678,7 +678,6 @@ new Worker('process.env.SET_IN_WORKER = "foo"', { eval: true, env: SHARE_ENV })
 ```cjs
 'use strict';
 
-const process = require('node:process');
 const { Worker, SHARE_ENV } = require('node:worker_threads');
 new Worker('process.env.SET_IN_WORKER = "foo"', { eval: true, env: SHARE_ENV })
   .once('exit', () => {