title: how to remove X-Powered-By in ExpressJS
body: <p>I want to remove X-Powered-By for Security,Save Bandwidth in ExpressJS(node.js). how to do it?
  it could be filter(app.use) ?</p>
  
  <pre><code>app.use(function(req,res,next_cb){ /* remove X-Powered-By header */ next_cb(); }
  </code></pre>