var blok  = document.getElementsByClassName('comments-stream ')[0];
var warunek = blok.getElementsByClassName('wblock lcontrast dC').length;
var elem = new Array();
elem   = blok.getElementsByClassName('wblock lcontrast dC');
var klasa = "color-0 showProfileSummary";

for(var i = 0;i<warunek;i++){
	var czy=elem[i].getElementsByClassName(klasa);
if (czy.length!==0) {
   blok.getElementsByClassName('wblock lcontrast dC')[i].innerHTML="";
   blok.getElementsByClassName('wblock lcontrast dC')[i].style.height = "0px!important";
}}