I have one CD/DVD drive, but you might have two. If so, follow this step twice!
The CD/DVD drive is one of the easiest components to remove. First, unplug the ribbon from the back of the drive. Once that is completed, pull on the tab securing the drive in place, then push it out from the inside.
If you don't have a second drive, there should be a flat piece of metal covering the drive slot. Follow the inscribed instructions to remove it.