via

• http://www.zone0.ne.jp/pgwiki/index.php?Xcode%2F%E3%82%A2%E3%83%B3%E3%82%A4%E3%83%B3%E3%82%B9%E3%83%88%E3%83%BC%E3%83%AB%E6%89%8B%E9%A0%86
• http://macdevelopertips.com/xcode/how-to-uninstall-xcode.html

shell>>
sudo /Developer/Library/uninstall-devtools --mode=all
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