With this script, you can remove all retweets you are retweeted on Twitter.

twitter-remove-retweets.js

const timer = ms => new Promise(res => setTimeout(res, ms));

// Unretweet normally
const unretweetTweet = async (tweet) => {
      const unretweetButton = tweet.querySelector('[data-testid="unretweet"]');
      if (unretweetButton) {
            await unretweetButton.click();
            await timer(250);
            const unretweetConfirmButton = document.querySelector('[data-testid="unretweetConfirm"]');
            if (unretweetConfirmButton) {
                  await unretweetConfirmButton.click();
                  console.log('****// Unretweeted Successfully //****');
            } else {
                  console.log('****// Unretweet Confirm Button Not Found //****');
            }
      } else {
            console.log('****// Unretweet Button Not Found //****');
      }
}

// Sometimes Twitter shows your retweet but the green retweet button is invisible and therefore you need to retweet again to unretweet. This function is for that.
const unretweetUnretweetedTweet = async (tweet) => {
      const retweetButton = tweet.querySelector('[data-testid="retweet"]');
      if (retweetButton) {
            await retweetButton.click();
            await timer(250);
            const retweetConfirmButton = document.querySelector('[data-testid="retweetConfirm"]');
            if (retweetConfirmButton) {
                  await retweetConfirmButton.click();
                  console.log('****// Retweeted Successfully //****');
                  await timer(250);
                  await unretweetTweet(tweet);
            } else {
                  console.log('****// Retweet Confirm Button Not Found //****');
            }
      } else {
            console.log('****// Retweet Button Not Found //****');
      }
}

setInterval(async () => {
      // Get all tweets
      const retweetedTweetList = document.querySelectorAll('[data-testid="socialContext"]');
      console.log('****// Retweeted Tweet List Collected //****');
      for (const retweet of retweetedTweetList) {
            const tweetWrapper = retweet.closest('article');
            tweetWrapper.scrollIntoView();

            const bookmarkBtn = tweetWrapper.querySelector("button[aria-label='Bookmark']");
            if (bookmarkBtn && confirm("Add to Bookmarks?")) bookmarkBtn.click();

            const isRetweeted = tweetWrapper.querySelector('[data-testid="unretweet"]');
            if (isRetweeted) {
                  console.log('****// Green Retweet Button Found - Starting "unretweetTweet" process //****');
                  await unretweetTweet(tweetWrapper);
            } else {
                  console.log('****// Green Retweet Button Not Found - Starting "unretweetUnretweetedTweet" process //****');
                  await unretweetUnretweetedTweet(tweetWrapper);
            }
            await timer(2000);
      }
      console.log('****// List Completed //****');
      console.log('****// Scrolling //****');
      console.log('                  ');
      console.log('                  ');
      console.log('                  ');
      console.log('                  ');
      console.log('                  ');
      console.log('                  ');
      console.log('                  ');
      console.log('                  ');
      await window.scrollTo(0, document.body.scrollHeight);
}, 60000);