Many customers have asked how they can delete or remove previously added hostnames to their distribution license. The answer being that a customer cannot delete or remove hostnames from their account. To get a hostname removed from your account you must reach out to support and they can remove it for you.
The reason for this is because the keys that are generated using the domains are perpetual and last forever, and customers could abuse adding and removing hostnames. Customer accounts and licenses are monitored by our teams for security and to ensure they are being used correctly.
Hope this answers any questions you may have about deleting host names.
Andrew Peterson
Technical Engagement Engineer