To Delete a host, click on the Delete button and Save. 

You may not delete a host with Admin privileges and multiple hosts can be Admins.

If you need to delete an Admin host, you must first edit their role and make them a regular host. Once this is done, and you have refreshed the page, you will see the Delete option next to their name.

Admin level hosts will have a check mark next to their name. Regular hosts will have an 'x'.
 

NOTE: You must have at least one Admin assigned. If there is only one host associated with the account, that host will become the Admin by default.