Hello,

Try below code on On-load client Script for duration field to hide hours, min and sec:

function onLoad() 
{
 document.getElementsByClassName('col-xs-7 col-sm-12 col-md-12 col-lg-8 no-left-padding-lg')[0].style.display='none';
}

Let me know the result.

Hit Helpful or Correct on the impact of response.

Regards,
Tushar
www.DxSherpa.com