Just stripts the side of the window using jQuery.
// ==UserScript==
// @name Channel Sidebar Remover
// @namespace https://greasyfork.org/en/scripts/383278-channel-sidebar-remover
// @version 0.1
// @description Just stripts the side of the window using jQuery.
// @author xElite_V (Stop! You Violated The Law!)
// @match https://www.twitch.tv/*
// @require https://code.jquery.com/jquery-3.4.1.min.js
// @grant none
// ==/UserScript==
(function() {
'use strict';
$(".side-nav").remove();
})();