message: Internal change. Not for public.
diff: @@ -270,8 +270,6 @@ Status BatchResourceBase::ConcatInputTensors(
  // In this context, Concat can be further optimized to get rid of
  // some (probably all) memcpy when input tensors are slices of
  // another copy.
  - // TODO(b/154140947):
  - // Add a custom implementation of Split and then optimize Concat.
  std::vector<Tensor> to_concatenate;
  to_concatenate.reserve(output->size());
  for (int j = 0; j < output->size(); ++j) {
  