Xcode Simulator: how to remove older unneeded devices?

I’m running Xcode 4.3.1 iOS-Simulator which originally only supports iOS 5.1. I need to test my code with iOS 4.3, so I used Xcode’s “Install” feature to install it as described in “Installing Xcode with iOS 4.3 device simulator?” Now I’m finished with testing but cannot find a way to uninstall the 4.3 portions (“iPhone … Read more