[PATCH 6/7] nvme: Unexport starting async event work

[Christoph Hellwig]

> +static void nvme_queue_async_events(struct nvme_ctrl *ctrl)
>  {
>  	queue_work(nvme_wq, &ctrl->async_event_work);
>  }
> -EXPORT_SYMBOL_GPL(nvme_queue_async_events);

I'd just kill this helper now that it's not even exported.