message: Remove os_release in MetalDriver
  os_release is only needed (and available) when ARC is turned off.
diff: @@ -126,9 +126,6 @@ MetalDriver::~MetalDriver() noexcept {
  mContext->device = nil;
  mContext->emptyTexture = nil;
  CFRelease(mContext->textureCache);
  -#if defined(FILAMENT_METAL_PROFILING)
  - os_release(mContext->log);
  -#endif
  delete mContext->bufferPool;
  delete mContext->blitter;
  delete mContext->timerQueryImpl;
  