title: Is there any method to clean the website unused resources
body: <p>Is there any method to clean the website unused resources like...</p>
  
  <ol>
  <li>CSS that are no more used in the website</li>
  <li>skins that are no more than in the website</li>
  <li>images that are no more than in the website</li>
  <li>Javascript function that are no more used in the website</li>
  </ol>
  
  <p>this thing require, when website is completed and ready for deployment.</p>