tracing, dma-buf: Remove unused trace event dma_fence_annotate_wait_on

[Steven Rostedt]

On Mon, 16 Oct 2017 20:49:11 +0530
Sumit Semwal <sumit.semwal at linaro.org> wrote:

> I suspect it should be ok; please do feel free to add my
> Acked-by: Sumit Semwal <sumit.semwal at linaro.org>
> if you wish :)

Done. Thanks!

-- Steve