How Do I Remove the Side Bar and the button in Confluence 5?

See the first post: https://jirasupport.wordpress.com/2015/06/08/how-do-i-remove-the-side-bar-in-confluence-5/

And modify the CSS Style of the Space ( from Space Admin options)

{style}
div#breadcrumb-section {display: none;}
div#splitter-sidebar {display: none;}
div#splitter-button {display: none; disabled: true;}
a#doctheme-anchor {cursor: default;pointer-events: none;}
{/style}