AIUI /usr/bin/git, and various other utilities, are tiny wrapper programs which will either 1) prompt you to install the Xcode Command Line Tools if they're not

AIUI /usr/bin/git, and various other utilities, are tiny wrapper programs which will either 1) prompt you to install the Xcode Command Line Tools if they're not installed, or 2) redirect to the actual binary in the Xcode Command Line Tools if they are installed. This means that if you don't have them installed, instead of an error saying that bash can't find git, you get a nice graphical prompt telling you where to get it. It can't be removed because it's a file that comes with OS X and is therefore covered by System Integrity Protection, which prevents you from deleting or tampering with system components, even as root.