Disable auto-complete feature for editable component.

 
<af:resource type="javascript">
   
      function disableAutoComplete(evt) {
      var comp = evt.getSource();
      comp.setAutoComplete('off');
      evt.close();
      }

    </af:resource>

 <af:inputText label="" id="pt_it1">
<af:clientListener method="disableAutoComplete" type="focus"/>
</af:inputText>

If you are interested to suppress auto-complete feature for browser form, you can refer Frank Nimphius's blog link