To remove any or all of the Logical Volumes or Units and Administrative settings you need to access Consol Tools. In consol tools you can enter F1 (Page 10 on the Manual) to get all the available tools. Where you are needing to remove Logical Volumes and set back system defaults enter alt. + ctrl. + x then select the following - remove Logical Volumes and Units. After that you can restore system to its default in the same section.