How to get rid of mid lines after baking grasshopper file?

Hi everyone,

I'm having a problem that probably is an easy fix but I'm trying to bake the attached section cuts in order to laser cut them. However, when I bake it has a horizontal and vertical midlines which I don't want because the laser cutter cuts through it. Does anyone have any suggestion to get ride of those lines? I tried exploding it after baking it but that didn't work. 

Any help would be appreciated and thanks in advance!