If you’d like to delete one or more of your extra mining accounts, visit your Account Settings page. This page can be found when you click on your username on the top-right corner of your screen. On this page, scroll down to the Mining Accounts area.
There are two options for deleting a mining account. One is to simply click on the trash can icon located to the far right side of the account slated for deletion.
The second option is to click on the Edit & Setup Payout link in the same area. Scroll to the bottom of the following page and you will see a Delete Account button.