At this time, we do not have a way for you to delete your Sequence Wallet account.
Instead, you can transfer all your items to another wallet on Ethereum or Polygon and abandon your current account. Learn how to do so in this article How do I send ETH and tokens?
We're sorry if we disappointed you in any sort of way, please feel free to let us know why in this short form (TBD) or in our #wallet-suggestions channel in Discord
Or were you looking to recover access of your Sequence Wallet account? please follow the steps in this article How to recover access to Sequence? (TBD)