title: Can I remove previous versions of iphone support in DeviceSupport folder in Xcode 4?
body: <p>In my quest to find out why Xcode is so big, i found out that a lot of the space is taken up by the subfolders to the Developer>Platforms>iPhoneOS.platform>DeviceSupport folder..</p>
  
  <p>Since I am (apparently) only allowed to develop for the last of them in Xcode, can I safely remove the rest (in this case 3.0 to 4.2.1)?</p>
  
  <p>Same question regarding the subfolders of Developer>Platforms>iPhoneSimulator.platform>Developer>SDKs..</p>