message: Cleanup LSTM tests: Set the weights and biases, and apply the delegate only once.
  The previous comment was not correct.
diff: @@ -134,7 +134,10 @@ class LSTMOpModel : public SingleOpModel {
  LSTMKernelType_FULL, asymmetric_quantize_inputs)
  .Union());
  - BuildInterpreter({}); // Input sizes are already set up.
  + // Input shapes are already set up, no need to pass them again.
  + BuildInterpreter(/*input_shapes=*/{}, /*num_threads=*/-1,
  + /*allow_fp32_relax_to_fp16=*/false,
  + /*apply_delegate=*/false);
  }
  void SetInputToInputWeights(const std::vector<float>& f) {
  @@ -329,15 +332,11 @@ class BaseLstmOpTest
  // Compares output up to tolerance to the result of the lstm given the input.
  void VerifyGoldens(LSTMOpModel* lstm, float tolerance) {
  - // Weights are set twice:
  - // - The delegate, if used, needs to know the scales and zero-points of
  + // The delegate, if used, needs to know the scales and zero-points of
  // quantized tensors, which are computed dynamically when weights are set,
  // so weights have to be set before applying the delegate.
  - // - Applying a delegate will invalidate the tensor data so weights have to
  - // be set a second time.
  SetAllWeightsAndBiases(lstm);
  lstm->ApplyDelegate();
  - SetAllWeightsAndBiases(lstm);
  const int num_batches = lstm_input_.size();
  EXPECT_GT(num_batches, 0);
  