Delete left column

Hello everybody,

I want to delete the left column (with the primary sidebar included) in my twentyfourteen child theme. Someone knows how can I do that?

I’m just using two columns on my site, one for the content and the other for the content side bar (at the right). I really dislike the blank space at the left side of my site, under the title. So I want that my title’s site was aligned with the content, and delete that blank space.

Before, I was thinking that it was just a question of “centering the whole site”, but it doesn’t do what I’m looking for.