title: How to undo bundle install?
body: <p>I am working on an Octopress blog, so I set up a separate gemset and did <code>rvm use gemset octopress</code>. It all worked fine. However, I opened a new ZSH tab (I'm on OS X Mountain Lion, if that's relevant) and it fell back to the previous gemset I was using. I didn't know that at that point though, so I ran <code>bundle install</code>. I noticed that it installed all the gems I had already installed in the Octopress gemset, so I figured out what was happening. The question: is there an easy way to undo this <code>bundle install</code>, so that I don't have all these gems in the other gemset, or should I uninstall them manually gem by gem (they are quite a few). Thanks.</p>