You may looking to correct an error you made with your DNS records, or are planning on moving your DNS elsewhere. You can delete your DNS records from our system by doing the following:
Log into your account and hover your mouse over the DNS icon at the top right of your page and select DNS Home from the drop-down.
You will be redirected to the Manage DNS page where you can scroll to the bottom to select the domain to manage, and click Go.
You'll be redirected to your domain's DNS page, showing you all the current DNS your domain has. Locate the record you wish to delete and click on the trashcan icon on the far right.