Changing post layout in Snaps: Removing left hand sidebar

So I’ve been dabbling around and learning as I go in CSS. However, I’m no wizard yet, and I cannot seem to find the section in the Snaps theme to remove the entire left side sidebar, and allow my post text and photos full access to the screen. I’ve whittled it down by “/*XXX*/” blocking out the tags/categories section in my CSS, but even if I remove the date (which is still there) the text of the post and photos do not ‘auto-extend’ out to the left.

Ultimately I would like to have the date show along the upper left corner, but then allow for the text and img block to spread out across the page.

Check it out here, and thanks in advance for any and all assistance!