Xcode
Uninstall
Remove the App first /Applications/Xcode.app
Then remove other related files which size is large.
$ du -sh ~/Library/Developer/Xcode
3.2G /Users/chenyang/Library/Developer/Xcode
$ du -sh ~/Library/Developer/CoreSimulator
12G /Users/chenyang/Library/Developer/CoreSimulator
$ mv ~/Library/Caches/com.apple.dt.Xcode /tmp
$ mv ~/Library/Developer/Xcode /tmp
$ mv ~/Library/Developer/CoreSimulator /tmp