Delete a Build Controller in TFS 2012

Question

I configured a Build Controller for TFS 2012, and 2 Agents for that in a Virtual machine several month ago. Now I remove the virtual machine that contains agents, and when I want to delete the build controller from TFS, it shows this error message:

and also it doesn't show me the Agents to delete them.

I want to know is there any way to delete the controller and reconfigure it again without accessing to the agents machine?

if my question is not clear enough tell me to complete it.

Answer 1

Open up visual studio 2012. Navigate to Team Explorer - Builds (Ctrl 0,B). There is an actions dropdown in the top left, click it and select Manage build controllers.