[SOLVED] How do I remove the white on the left and right sides of an image?

It looks like padding. But when I float my cursor over the left and right of an image it's part of the image. I have searched for a long time (multiple times over the years I've used Atahualpa) and have not found a solution.

How do I remove this "padding" of sorts?

http://www.loadedkiln.com/