Google is constantly doing experiments to see what its users like best. Today I was slapped with one of their tests, the “Everything Sidebar”. It really screwed with me and was entirely distracting while I was searching. So naturally I looked for a way to reverse it. It’s easy enough, you just need to delete a cookie.
Here is a screen shot of the results page
At any rate, if you want it gone just delete the PREF cookie from google.com.