message: Remove TODO without task and improve comment.
diff: @@ -118,7 +118,7 @@ TfLiteStatus Prepare(TfLiteContext* context, TfLiteNode* node) {
  op_context.constant_values->type);
  }
  - // TODO(nupurgarg): Current implementations rely on the inputs being <= 4D.
  + // Ensure we do not exceed maximum dimension count.
  TF_LITE_ENSURE(
  context, op_context.dims <= reference_ops::PadKernelMaxDimensionCount());
  