How do I delete an existing virtual server?

Login to the ServerQuery from within your client (Tools => ServerQuery) and use the "serverdelete" command to delete an existing virtual server. Please note that the virtual server needs to be stopped before it can be deleted.

TS3
login serveradmin password
error id=0 msg=ok
serverstop sid=2
error id=0 msg=ok
serverdelete sid=2
error id=0 msg=ok

Please check the ServerQuery documentation (ts3_serverquery_manual.pdf) for additional information on how to use these sorts of commands.