Make the new Twitter suck less
This is a Chrome extension you can install locally to remove the distracting side-bar from Twitter. If you want to search, you can change the permissions for the thing (or make your own version).
To Install
Clone this directory, then go to chrome://extensions in your browser, and "Load unpacked". Make sure "Developer mode" is enabled. This will install the extension and you should not see the right side bar when you navigate to Twitter. Happy browsing!