arm, testsuite: remove duplicate dg-add-options arm_v8_3a_complex_neon

These two testcases have twice the same dg-add-options
arm_v8_3a_complex_neon, the patch removes one of them.

gcc/testsuite/ChangeLog:

	* gcc.dg/vect/complex/complex-operations-run.c: Remove duplicate
	dg-add-options arm_v8_3a_complex_neon.
	* gcc.dg/vect/complex/fast-math-bb-slp-complex-add-pattern-double.c:
	Likewise.

gcc/testsuite/gcc.dg/vect/complex/complex-operations-run.c

 /* { dg-require-effective-target vect_complex_add_double } */
 /* { dg-add-options arm_v8_3a_complex_neon } */
-/* { dg-add-options arm_v8_3a_complex_neon } */
 
 #include <stdio.h>
 #include <complex.h>

gcc/testsuite/gcc.dg/vect/complex/fast-math-bb-slp-complex-add-pattern-double.c

 /* { dg-do compile } */
-/* { dg-add-options arm_v8_3a_complex_neon } */
 /* { dg-additional-options "-ffast-math -fno-tree-loop-vectorize" } */
 /* { dg-require-effective-target vect_double } */
 /* { dg-add-options arm_v8_3a_complex_neon } */