[NPU] remove duplicated stream sync in fetch op (#33819)

paddle/fluid/operators/controlflow/fetch_op.cc

@@ -44,11 +44,6 @@ static void DataCopy(const framework::LoDTensor &src_item,
       TensorCopySync(src_item, platform::CPUPlace(), dst_item);
     }
 #else
-#ifdef PADDLE_WITH_ASCEND_CL
-    if (platform::is_npu_place(src_item.place())) {
-      platform::DeviceContextPool::Instance().Get(src_item.place())->Wait();
-    }
-#endif
     TensorCopySync(src_item, platform::CPUPlace(), dst_item);
 #endif
   } else {