unassign_group

unassign_group_group 
-net_group1 s_netGroupName 
-net_group2 s_netGroupName

Removes a group-level constraint group assignment previously set by assign_group_group.

`-net_group1` s_groupName
	Specifies the name of the first net group.
`-net_group2` s_groupName
	Specifies the name of the second net group.