Something

// ==UserScript==
// @name           4chan Adverts
// @namespace      4chan
// @description    Removes Adverts
// @include        http://*.4chan.org/*
// ==/UserScript==

function removeContent(id) {

	var node =
		document.getElementById(id);

	if (node) {
		node.parentNode.removeChild(node);
		node = null;
	}
}

removeContent(
	'logo'
);