Good evening. I am the server administrator for http://www.gametracker.com/server_info/173.199.78.9:21035/

I do not want this server to be on this site. Please remove it. This is a private server, and is not open to the public.

You can do that yourself.
Take ownership (if you haven't already)
Then use the Manage page to remove / delete server.

Edit: though now that I check, it seems you may have already done it.