Delete promoted tweets greasemonkey script

gm.js

// ==UserScript==
// @name        Delete promoted tweets
// @namespace   kyoder
// @include     *mobile.twitter.com/*
// @include     *m.twitter.com/*
// @include     *.twitter.com/*
// @include     http://twitter.com/*
// @include     https://twitter.com/*
// @version     1
// @grant       none
// ==/UserScript==

function killit()
{
  
var kills = document.getElementsByTagName("span");

  
for(var i = 0; i < kills.length; i++)
{
  
  if (kills.item(i).innerHTML == "Promoted")
    kills.item(i).parentNode.parentNode.parentNode.parentNode.parentNode.parentNode.parentNode.style.display = "none";

}
}


window.onscroll = killit;

Updated. Too many .parentNodes were deleting all posts on user pages.