delete-twitter-likes.js

// 1. navigate to your likes page
// 2. paste this script into the console
// 3. hit 'enter'
// 4. repeat if necesary

setInterval(() => {
Array.from(document.getElementsByTagName('div'))
  .filter(x => x.getAttribute('data-testid') == 'unlike')
  .forEach(x => x.click())
window.scrollTo(0, document.body.scrollHeight || document.documentElement.scrollHeight)
},1000);