Removing the sidebar by CSS probably isn’t the best route – because the sidebar is still being generated and sent to the browser (even though it appears not to be visible).
That said, something like this should do the trick:
It has been suggested in the past to add that to your css stylesheet, but sadly that doesn’t work, I believe because the naming convention in the plugin has changed since that fix was advised, so I’m still non the wiser!
Sorry Lori, ignore my last post, I was being an idiot not reading the thread. Yes that fix worked for me to – I thought I was commenting on a different, current issue I have regarding removal of the main plugin title on each sheet!