include/oneapi/dpl/pstl/algorithm_impl.h - fix compile error: unused wariable

Author: SergeyKopienko

include/oneapi/dpl/pstl/algorithm_impl.h

@@ -3680,8 +3680,8 @@ __parallel_set_op(__parallel_tag<_IsVector> __tag, _ExecutionPolicy&& __exec, _R
                           __set_union_op, __comp,  __proj1,  __proj2, __buf_raw_data_begin,
                           __mask_bufs};
 
-        auto __apex_pred = [__n_out, __result1, __result2, &__res_reachedOutPos,
-                            &__scan_pred](const _SetRange& __total) {
+        auto __apex_pred = [ [[maybe_unused]] __n_out, &__res_reachedOutPos, &__scan_pred ](const _SetRange& __total)
+        {
             //final scan
             __scan_pred(/* 0 */ _DifferenceType1{}, /* 0 */ _DifferenceType1{}, __total);