title: Silverstripe: Remove Viewer Groups Tab
body: <p>I'm trying to remove the 'ViewerGroups' tab from the back end of the CMS. I've tried:</p>
  
  <pre><code>$fields-&gt;removeByName("Root.ViewerGroups");
  </code></pre>
  
  <p>and </p>
  
  <pre><code>$fields-&gt;removeByName("ViewerGroups");
  </code></pre>
  
  <p>but neither seem to be working. Does anyone know how I can remove this tab?</p>