A GreaseMonkey script for eliminating the SJW button from YT home page.

classic_yt_button.user.js

// ==UserScript==
// @name          classic_yt_button
// @namespace     https://gist.github.com/todomodo/
// @description   Strip the (SJW) image from YT home button, so it can be later replaced with the classic version
// @include       https://www.youtube.com/*
// ==/UserScript==

var loop_count = 0;

// the page will try to render and then re-render the SJW button several times.
var intv = setInterval(function() {
  // find the IMG element and clear the image
  elem = document.querySelector('img.ytd-yoodle-renderer');
  if (elem) {
    if (elem.getAttribute("src")) {
    	console.log("whacked one!...");
    	elem.setAttribute("src", "");
      elem.setAttribute("alt", "Heil Jesus");
    }
  } 
  
  // find the SOURCE element and clear the set
  elem = document.querySelector('source.ytd-yoodle-renderer');
  if (elem) {
    if (elem.getAttribute("srcset")) {
    	console.log("whacked one!...");
    	elem.setAttribute("srcset", "");
    }
  } 
  
  // exit the loop after 5 seconds
  if (loop_count>200) {
    // 25ms x 200 cycles = 5 seconds
    clearInterval(intv);
    console.log("...done");
  } else {
  	loop_count+=1;
  }
}, 25); // check every 25 ms