refine add_n (#57003)

paddle/fluid/ir/dialect/paddle_dialect/ir/pd_manual_op.cc

@@ -182,7 +182,6 @@ void AddN_Op::Build(ir::Builder &builder,
 
   VLOG(4) << "Builder construction outputs";
   ir::VectorType inputs = inputs_.type().dyn_cast<ir::VectorType>();
-  (void)inputs;
   std::vector<phi::DenseTensor> vec_dense_inputs;
   for (size_t i = 0; i < static_cast<size_t>(inputs.size()); i++) {
     vec_dense_inputs.push_back(phi::DenseTensor(
@@ -311,7 +310,6 @@ void AddNWithKernelOp::Build(ir::Builder &builder,
 
   VLOG(4) << "Builder construction outputs";
   ir::VectorType inputs = inputs_.type().dyn_cast<ir::VectorType>();
-  (void)inputs;
   std::vector<phi::DenseTensor> vec_dense_inputs;
   for (size_t i = 0; i < static_cast<size_t>(inputs.size()); i++) {
     vec_dense_inputs.push_back(phi::DenseTensor(