title: How to remove not used classes from JQuery UI
body: <p>We are using JQuery UI lib for some interface enhancements which works great. But since we don't need to support IE6 and other old browsers, there is no need for classes like:</p>
  
  <blockquote>
    <p><code>.ui-corner-all, .ui-corner-top, .ui-corner-left, .ui-corner-tl</code></p>
  </blockquote>
  
  <p>which are added by JQuery UI. Is there any way to tell JQuery UI not to add them? It is no problem to remove style from it, but it doesn't look good when you have there a lot of empty classes.</p>