title: How to remove the useless unconfigured items in matrix build of Jenkins/Hudson
body: <p>I use Jenkins to configure my multiconfiguration build, which is like a snapshot.</p>
  
  <p>The Axes I use are:</p>
  
  <ul>
  <li><strong>Labels</strong>: <em>Mac10.6</em>, <em>Mac10.7</em>, and <em>Windows</em></li>
  <li><strong>Platforms</strong>: <em>Mac10.6</em>, <em>Mac10.7</em>, <em>WinXP</em>, <em>Win7</em>, and <em>WinServer2008</em></li>
  <li><strong>Tasks</strong>: _App_Installer_, <em>ATS</em>, and so on</li>
  </ul>
  
  <p>It is clear that it makes no sense for <em>WinXP</em> to build on label <em>Mac10.6</em>. Although it is shown as diabled/unconfigured, it still confuses people.  </p>
  
  <p>So is there any way to remove the useless configuration?</p>