I managed to remove a couple of shelves in order to provide more room. I ended up just storing them up in the drip tray under the freezer. It took some tinkering, but I got one or two shelves our without removing the fridge from the outdoor compartment.
You definately cannot remove a full size shelf, though.
Figured a way to adjust shelves in outdoor fridge , haven't tried yet ,but it should work . Take the shock off to the end that is near the door of the fridge and it should have enough room to open the door wider to allow the shelves to be moved..