title: Jenkins pipeline - Remove @tmp folder
body: <p>I am using "Workspace Cleanup Plugin" to clean workspace after the job finishes. But still <code>@tmp</code> directory is not deleted.</p>
  
  <p>Any way we can delete this <code>@tmp</code> folder using pipeline script.</p>
  
  <p>It looks like a known issue as far as I see in Jira:</p>
  
  <ul>
  <li><a href="https://issues.jenkins-ci.org/browse/JENKINS-44909" rel="nofollow noreferrer">https://issues.jenkins-ci.org/browse/JENKINS-44909</a></li>
  <li><a href="https://issues.jenkins-ci.org/browse/JENKINS-41805" rel="nofollow noreferrer">https://issues.jenkins-ci.org/browse/JENKINS-41805</a></li>
  </ul>