Put a couple honey frames on each side. Then put an empty, then a partly drawn frame, then another empty. I'm assuming you're running 10 frame boxes and that'll give you ten frames across the medium. The bees will build out and move the honey up as needed.
If you trying to remove the deep completely, you could cut the cut the brood out of the deep frames, then cut the comb in half lengthwise and secure the pieces into medium frames. Each deep frame will give you two medium frames.