Revert "* fix: 🐛 Enabling workbox to cache webfonts and fonts-stylesheets, add local fonts for UMD build (#906)" (#961)

This reverts commit 69b96478cb.

platform/viewer/src/index-umd.js

@@ -7,8 +7,6 @@ import React from 'react';
 import ReactDOM from 'react-dom';
 import App from './App.js';
 
-import './fonts/fonts.css';
-
 function installViewer(props, containerId = 'root', callback) {
   const container = document.getElementById(containerId);