I use Storefront for all of my plugin demos. As such, I have made a child theme and done some basic customisations to bring the theme inline with my branding.
One of the customisations I made was to hide the sidebar on product pages. There’s a few tips around on how to do this, but required adding some CSS which I didn’t want to do. The following snippet disables the sidebar with no additional CSS required, whilst still making the product page content area 100% wide.