How to delete a domain from your site?
First, navigate to the 'DNS' > ‘DNS records’.
Next, choose the site where your target domain belongs. To do this, go to the Operation level panel on the top left side of the platform, and select the site on the ‘Site’ panel.
Hover through your target domain (i.e. A or CNAME record) within the list, and click the ‘Arrow down’ button to show all the details of the domain.
Scroll all the way to the bottom left, and click the ‘Delete’ button to delete the domain entirely.