Magento 2.3.1, where’s tinymce setup.js?

In magento 2.3.1, installed on aws lightsail using bitnami. I’m trying to disable tinymce from inserting

tags, and the solution that many agree with is

https://stackoverflow.com/a/26396255/1920003

forced_root_block : '', /* < -- Add this setting */

to

js/mage/adminhtml/wysiwyg/tiny_mce/setup.js

But there are many setup.js files and none look like the standard setup.js file. I really want to apply this solution because

  1. I can’t upgrade to newer version off magento, I have 50 extensions that will break
  2. I can’t disable the wysiwyg, there are none technical users editing the site
  3. I believe this will work, when I used to create my own hand written CMSes, I used to face a similar problem and fix it like that.