High CPU animating static value after updating progress

[rowan-OzRunways]

Updating progress updateProgress(1.0) calls animate() eventually leading to progressLayer.add(animation, forKey: AnimationKeys.progress)

This leads to high CPU use due system calling draw() repeatedly even after the animation has finished and the progress is set to the final value.

Setting animation.isRemovedOnCompletion = true fixes the issue at my end. Another work around is setting a completion handler and calling updateProgress(1.0, animated: false, ...) to kill the animation, which is not ideal.

I'm unaware of any broader issues setting isRemovedOnCompletion so leaving this as an issue rather than pull request.