[SYCL][NFC] Fix unused arguments in reductions (#6092)

Signed-off-by: Larsen, Steffen <[email protected]>

Author: steffenlarsen

sycl/include/CL/sycl/reduction.hpp

@@ -143,7 +143,7 @@ std::enable_if_t<Extent != dynamic_extent &&
                      T, BinaryOperation, 1, Extent,
                      ext::oneapi::detail::default_reduction_algorithm<
                          true, access::placeholder::false_t, 1>>>
-reduction(span<T, Extent> Span, BinaryOperation,
+reduction(span<T, Extent>, BinaryOperation,
           const property_list &PropList = {}) {
   // TODO: implement reduction that works even when identity is not known.
   (void)PropList;

sycl/include/sycl/ext/oneapi/reduction.hpp

@@ -2116,7 +2116,7 @@ void reduCGFuncImplArray(
     ReduTupleT<OutAccT...> OutAccsTuple, std::tuple<ReducerT...> &ReducersTuple,
     ReduTupleT<Ts...> IdentitiesTuple, ReduTupleT<BOPsT...> BOPsTuple,
     std::array<bool, sizeof...(Reductions)> InitToIdentityProps,
-    std::index_sequence<Is...> ReduIndices) {
+    std::index_sequence<Is...>) {
   using ReductionPack = std::tuple<Reductions...>;
   (reduCGFuncImplArrayHelper<Pow2WG, IsOneWG,
                              std::tuple_element_t<Is, ReductionPack>>(
@@ -2419,7 +2419,7 @@ void reduAuxCGFuncImplArray(
     ReduTupleT<InAccT...> InAccsTuple, ReduTupleT<OutAccT...> OutAccsTuple,
     ReduTupleT<Ts...> IdentitiesTuple, ReduTupleT<BOPsT...> BOPsTuple,
     std::array<bool, sizeof...(Reductions)> InitToIdentityProps,
-    std::index_sequence<Is...> ReduIndices) {
+    std::index_sequence<Is...>) {
   using ReductionPack = std::tuple<Reductions...>;
   (reduAuxCGFuncImplArrayHelper<UniformPow2WG, IsOneWG,
                                 std::tuple_element_t<Is, ReductionPack>>(