Microsoft Windows XP [Version 5.1.2600] (C) Copyright 1986-2001 Microsoft Corp. C:\WINDOWS>netsh routing ip relay delete dhcpserver ?
Usage: delete dhcpserver [server=]
server - The IP address of a DHCP server to be removed from
the global list.
Remarks: Deletes DHCP servers from the global list of DHCP servers.
delete dhcpserver 10.0.0.1