Layout - how to remove parts without removing routes?

I have a design that will be built with population options (some parts removed). I need to show assembly views with the build options - showing parts removed.

In layout, in ECO mode, when I delete a component, it removes traces. There is a dialog that pops up asking me if I want to remove routes, and I uncheck the box (don't remove routes).

But then another box pops up telling me that some other nets will be removed. These are nets that only go to one other pin.

Is there a way to remove parts without affecting the copper on the board?

Thanks

Dan