You can permanently remove a subdomain from the database.
On the left navigation
panel, go to the section Services Windows
Web Hosting > IIS Web Service, then click Subdomains.
On the Subdomains
page, click the option button corresponding to the subdomain to be removed.
Click Remove.
Click
OK to confirm. The subdomain is removed from the list.
Note:
Deleting a subdomain does not delete the corresponding physical directory
or files.