[Mac][OsX] Uninstall XCode 4

If you're having trouble with XCode 4 and want to uninstall it you have to use the following command from the Terminal:

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

Or, more in general:

sudo your-xcode-folder/Library/uninstall-devtools --mode=all

And restart the system if you're planning to install a previous version of Developer Tools.
That's all folks!