How to remove your LastPass account
Be logged in on the site; then use the removal link. A good thing for a service such as Last Pass, for you wouldn’t want all those passwords to be present on their site for an eternity.
Direct removal link: https://lastpass.com/delete_account.php
Helpful Trick: Removing online data
Helpful Trick: Remove third-party logins
If you signed up for LastPass using a third-party login such as Facebook or Twitter, you probably want to revoke all access from LastPass. Click here to find out how.