title: jQuery validate -How do I remove a specific error message without removing any other error messages?
body: <p><strong>See</strong>: <a href="http://jsfiddle.net/edaloicaro18/K2tv4/41/" rel="nofollow">jsFiddle</a></p>
  
  <p>I'm trying to remove <strong>only a specific error message (<em>"Select a department"</em>)</strong>, when a different option to "External" is selected from the select list <strong>"Role"</strong>, since only when a user role is <strong>"External"</strong> I need to specify which department that user belongs to.</p>
  
  <p>I've only been able to remove the error style using <code>removeClass("error")</code>, but even after I've removed that class, the error message is still display and it only disappears if I attempt to submit the form and that's not what I want, what I want to do is to make that error message (<strong>"Select a department"</strong>) disappear <strong>as soon as another user role is selected</strong>(a role different to "external" of course)</p>
  
  <p><strong>In order for you to understand me more easily I have put up a</strong> <a href="http://jsfiddle.net/edaloicaro18/K2tv4/41/" rel="nofollow">jsFiddle</a>.</p>
  
  <p>I really hope you can help me out</p>