Deletes your tweets and retweets.

tweet-deleter.user.js

// ==UserScript==
// @id             twitter.com-5b386b3d-0070-1b41-8d9d-843c35933093@erikvold
// @name           Tweet Deleter
// @version        1.0
// @namespace      erikvold
// @author         Erik Vold
// @description    
// @include        https://twitter.com/erikvold
// @run-at         document-load
// ==/UserScript==

function removeRetweets() {
  let retweets = GM_xpath({
    paths: ['//div[not(@data-name="erikvold")]//a[contains(@class, "undo-retweet")]'],
    all: true
  });

  //alert(retweets.length);

  retweets.forEach(function(a) {
    if (!/cannot-retweet/.test(a.previousSibling.previousSibling.getAttribute('class'))) {
      a.click();
    }
  });
}

function deleteNext() {
  GM_xpath('//div[@data-name="erikvold"]//a[contains(@class, "js-action-del")]').click();
  setTimeout(function() {
    GM_xpath('//div[@id="delete-tweet-dialog-dialog"]//button[contains(@class, "btn primary-btn delete-action")]').click();
    deleteNext();
  }, 1000);
}
removeRetweets();
deleteNext();