Xcode 6.1 - How to uninstall command line tools?
If you installed the command line tools separately, delete them using:
sudo rm -rf /Library/Developer/CommandLineTools
An excerpt from an apple technical note (Thanks to matthias-bauch)
Xcode includes all your command-line tools. If it is installed on your system, remove it to uninstall your tools.
If your tools were downloaded separately from Xcode, then they are located at
/Library/Developer/CommandLineToolson your system. Delete the CommandLineTools folder to uninstall them.
you could easily delete using terminal:
Here is an article that explains how to remove the command line tools but do it at your own risk.Try this only if any of the above doesn't work.
You can simply delete this folder
/Library/Developer/CommandLineTools
Please note: This is the root /Library, not user's ~/Library).