 :Hi. The edit was put there by the user themself - it was a request to have their Autoblock removed, and they obviously changed their mind. It's all good, though why they are using the same IP address as a vandal may be worth looking into. Removing warnings or block notices is not usually a problem. If they are a vandal they will be blocked no matter what's left on their talk page, and if they are blocked and the removal of the block notice is seen as disruptive then their talk page can be protected. WP:USER has the details.    