If you have not already done so, in the Change Center of the Administration Console, click Lock & Edit (see Use the Change Center).
In the left
pane of the Console, expand Environment and
select Machines.
The Machines table displays in the right pane showing all the
machines defined in the domain.
Select the
check box next to the name of the machine you want to delete and click
Delete.
A dialog displays asking you to confirm your deletion
request.
Click
Yes to delete the machine.
To activate these changes, in the Change Center of the Administration Console, click Activate Changes. Not all changes take effect immediately—some require a restart (see Use the Change Center).