Admin portal in Horizon cloud on Azure provides you an option to delete only UAG’s, this is very straight forward with few clicks:

Logon to the Horizon Cloud here using the ‘My VMware’ account credentials and navigate to capacity section under settings.

• Click on pod name to open the details page
• Summary > Delete > External Gateway

• If your environment has internal gateways, even they can be deleted in same way.
• Once gateways are deleted successfully, you will see this under pod summary page.

Note: This is one way process and all resources related to UAG will be deleted, no way to restore it back.