[OpenACC] cleanup trans-stmt.h

	gcc/fortran/
	* trans-stmt.h: Remove stale reference to trans-openacc.c.

From-SVN: r263372

gcc/fortran/ChangeLog

+2018-08-07  Cesar Philippidis  <cesar@codesourcery.com>
+
+	* trans-stmt.h: Remove stale reference to trans-openacc.c.
+
 2018-08-04  Janus Weil  <janus@gcc.gnu.org>
 
 	PR fortran/45521

gcc/fortran/trans-stmt.h

@@ -70,8 +70,6 @@ tree gfc_trans_deallocate_array (tree);
 /* trans-openmp.c */
 tree gfc_trans_omp_directive (gfc_code *);
 void gfc_trans_omp_declare_simd (gfc_namespace *);
-
-/* trans-openacc.c */
 tree gfc_trans_oacc_directive (gfc_code *);
 tree gfc_trans_oacc_declare (gfc_namespace *);