Erx: Remove Learn/Community Panel?

How do I remove the learning community panel on the left-hand side of light room. I'm on a 13 inch Mac when I'm on the road and screen real estate is out of premium and this is just wasted space for me to do my work, but I can't figure out how to turn it off or get rid of it.

If somebody has ideas of how to do that, I would be greatly appreciated!