title: Delete an unreferenced image from repository in Xcode
body: <p>I deleted default.png from my resources folder because I wanted a different image for the loading screen, but I just deleted the reference which was apparently a dumb thing to do. I dragged the new image into resources and tried to change the name to Default.png, but it won't let me, which I think is because the first Default.png is still in the repository somewhere. Anyway, how do I delete that image(and others with which I have probably done the same thing) from the repository when it is no longer visible in xcode?</p>