delBnc.js

// https://twitter.com/search?q=lang%3Aja%20filter%3Areplies%20(card_domain%3Abnc.lt%EF%BD%9Ccard_domain%3Afanlink.to%20%EF%BD%9Ccard_domain%3An9oi1.app.link)&src=typed_query&f=live
// ↑ にアクセスして ↓ をコンソールにこぴぺ
const interval = 3000;

function delBnc() {
  let tweets = document.evaluate('//article[@data-testid="tweet"]//div[@aria-label="もっと見る"]', document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
  let elem = tweets.snapshotItem(0);

  if(elem != null) {
    let targetDOMRect = elem.getBoundingClientRect();
    let targetTop = targetDOMRect.top + window.pageYOffset;
    document.documentElement.scrollTop = targetTop;

    elem.click();
    let belem = document.querySelector("[data-testid=block]");

    if(belem != null) {
      belem.click();
      document.querySelector("[data-testid=confirmationSheetConfirm]").click();
      setTimeout(delBnc, interval);
    } else {
      elem.click();
    }
  }
};
setTimeout(delBnc, interval);

delOldTweet.js

// https://twitter.com/search?f=live&q=(from%3Akyohsuke14)%20until%3A2023-07-01&src=typed_query
// ↑ な感じで from のあとにある "kyohsuke14" を自分のアカウントIDに変更してアクセスして ↓ をコンソールにこぴぺ

const interval = 3000;

function delOldTweet() {
  let tweets = document.evaluate('//article[@data-testid="tweet"]//div[@aria-label="もっと見る"]', document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
  let elem = tweets.snapshotItem(0);

  if(elem != null) {
    let targetDOMRect = elem.getBoundingClientRect();
    let targetTop = targetDOMRect.top + window.pageYOffset;
    elem.click();

    document.documentElement.scrollTop = targetTop;
    setTimeout(function(){
      let belems = document.querySelector("[data-testid=Dropdown]");
      let belem = belems.children[0];
      if(belem != null) {
        belem.click();
        document.querySelector("[data-testid=confirmationSheetConfirm]").click();
        setTimeout(delOldTweet, interval);
      } else {
        elem.click();
      }
    }, 300);

  }
};

setTimeout(delOldTweet, interval);