Delete your old tweets and then delete your twitter account.
Before you do that, submit a request for an export of your tweets for your archival purposes, maybe someone will make a tweet importer for nostr?
#grownostr
Discussion
Or even better, never create a twitter account in the first place. Once you've put data on a platform, does it ever really go away? When you delete your posts, are they really deleted from that computer in the cloud?
No idea. Not all of us realized we shouldn't have created a Twitter account 8 years ago.