Hiding the left hand navigation bar in SharePoint 2013 proved a little tricker than I expected.

My initial attempt to hide the navigation using CSS was to hide #sideNavBox.

However, I found this had the side effect of hiding the search refiners on /_layouts/15/osssearchresults.aspx.  I settled on hiding .ms-core-sideNavBox-removeLeftMargin as this doesn’t appear to have any side effects.