Delete your account only if you are absolutely certain you no longer need the account secrets.
To delete your account scroll the menu and tap the Settings button.
On the settings page tap the Account settings button in the Account section.
On the account settings page scroll to the bottom and tap the Delete account button in the Admin section.
To continue you must confirm the account password and tap the switch to accept the consequences of deleting the account.
Then tap the Delete button; you will be asked to confirm that you really want to delete the account.
Tap Ok to delete the account; you will be signed out and redirected to the launch screen.