The ability to Delete a Data Source in CAPC is disable by default, even for Admin Users.
To Add the ability to delete a Data Source in CAPC follow the steps below:
1.Login with a user with Admin privileges and go to Admin->Users.
2. Find the Role assigned to the user you wish to use to Delete the Data Source.
3. Go to Admin->Roles, find that Role and click edit and find the Performance Center set of roles and click Edit.
4. Got to Performance Center and move the Delete Data Source Role to the right hand column and click OK.
5. You may need to log out and log back in, but then go to Admin->Data sources and delete the NFA data source.