no-trending.js

// ==UserScript==
// @name         No Trending
// @version      0.1
// @description  Turn off twitter trending
// @author       You
// @match        https://twitter.com/*
// @icon         https://www.google.com/s2/favicons?domain=twitter.com
// @require      https://raw.githubusercontent.com/muicss/sentineljs/master/dist/sentinel.min.js
// @grant        none
// ==/UserScript==

sentinel.on([
    '[aria-label*="trending now" i]',
], node => node.remove())