Originally Posted by JD Gumby
If you mean the Discover section, unfortunately there's nothing you can do to reclaim the space. Best you can do is go into Settings -> Apps -> All and look for the "Discovery Service" and disable it (and the "KoboTracking" and the blue & yellow one with the Chinese character while you're there - the latter is for inputting Asian characters, but it for some reason needs access to your contacts. I don't trust it). That will clear the pictures from the Discover area.
You can also choose to install a different launcher program - it takes away the stupid discovery bar completely and makes the tablet look like a true android device. The only drawback is then you don't have tapestries.... small price to pay IMO.