Hi,You could have missed them or you haven't changed the filtering so that the GPMC only shows managed policies, Here is how you turn of the filtering. http://technet.microsoft.com/sv-se/library/cc787811(v=ws.10).aspx
Just removing the policy won't do anything though because these aren't actually policies. You need to reset or delete the values using a startup script or other method. I highly recommend deleting the values and never think about using these policies again. Also, make sure you do remove these values from the policy also.
Jason | http://blog.configmgrftw.com