Every time I go to remove my old csgo server its says Cannot delete servers with this source type. can someone help please I would like to get if off my servers list

If the server is dead, it will be automatically removed after being down too long.

If the server is not dead, you can remove the query settings so GT will show it as down: http://www.gametracker.com/games/csgo/forum.php?thread=91691

Otherwise, you can always simply unfavorite a server and it will no longer be in your list.