Delete Curtain Panel?

I'm putting an entry vestibule into an exterior wall. Both are made with curtain walls. The vestibule is centered on the lobby wall: half in / half out. But the lobby curtain wall glass continues through the vestibule! I've removed the lobby wall mullions but I can't get rid of the glass panels, which cut through the vestibule. Any suggestions? Please see attached image.

Select the panels, then change them to 'Empty System Panel' in the Type Selector dropdown box.

That's the trick - thank you!