Remove unused openacc call

[Jakub Jelinek]

On Wed, Apr 20, 2016 at 10:46:38AM +0200, Thomas Schwinge wrote:
> On Mon, 9 Nov 2015 16:58:48 -0500, Nathan Sidwell <nathan@acm.org> wrote:
> > I've committed this to trunk.   It nuke the now unused GOACC_GET_NUM_THREADS and 
> > GOACC_GET_THREAD_NUM  calls.
> 
> > 	* omp-low.c: [...]
> > 	(lower_reduction_clauses): Remove BUILT_IN_GOACC_GET_THREAD_NUM call.
> > 	* omp-builtins.def (BUILT_IN_GOACC_GET_THREAD_NUM,
> > 	BUILT_IN_GOACC_GET_NUM_THREADS): Delete.
> 
> Given that in GCC 6 we only provide host fallback execution for
> executables compiled with GCC 5 (and thus using the legacy entry points),
> we can further clean this up as follows.  OK for gcc-6-branch and trunk?
> 
> commit a3993b5fae8b430e1dca23179aaa23a6c53ea2fb
> Author: Thomas Schwinge <thomas@codesourcery.com>
> Date:   Tue Nov 10 16:59:46 2015 +0100
> 
>     Clean up libgomp GCC 5 legacy support
>     
>     	libgomp/
>     	* config/nvptx/oacc-parallel.c: Empty file.

Ok for trunk and 6.2, we don't need this for 6.1.

	Jakub