Reduce the height of the section in UCI

Hi,

I've added a web resources in the section the of the form but I can't adjust the height of the section. I have tried to remove the height through the unsupported way by using jQuery but it isn't working below the screenshot of the section that I am trying to remove.

And here is the jQuery I've tried,

function resizeIframe(){
debugger;


setTimeout(function() {
    headerFlagsResize(); 
    
}, 1500);


   
}

function headerFlagsResize() {
  debugger;
     $("section[data-id=tab_12_section_8]").css('height', '12px');
 
     
}

Thanks.