Hi,

There is no configuration within K2 that can allow you to deactivate that button. You will have to explore some other ways, such as using javascript to do it.

You can remove it with jQuery. Try adding the following code to a literal DataLabel. Don't forget to deselect "Prevent XSS". You might also need to add the same code for ".menu-item.picker-search" click event, since you can open the search windows via 2 ways.

$(function() {
   $( ".picker-search.border-left-only" ).click(function(){
      setTimeout(function() {
         $(".help").hide();
      }, 1);
   });
});