Remove ribbon

Can you provide a link to your site please?

Yes, you can use CSS in a child theme or a CSS plugin (like Jetpack) to do this. I recommend using Firebug for CSS work–makes it much easier.

Target .black-bar, .ribbon-left, and .ribbon-right and set to display: none in your child theme or Custom CSS plugin to hide the ribbon. You may need to adjust the margins/padding around your content to get the look you want, but this should get you started.

.black-bar,
.ribbon-left,
.ribbon-right {
  display: none;
}