Good question, I have been trying to figure this out myself.
I opened up the inner trim and it looks like the bottom row just unclips by pulling hard and once the bottom clips are undone, the top section comes off by sliding the whole panel bacwards a little.
As I said, I havnt yet done this so err on the side of caution on this one.
I would strongly suggest buying a whole new set of clips *before* removing the panels as your bound to break some in the process of removing the panel, besides which, they dont cost much.