message: Do not cache bias_md anymore.
diff: @@ -1618,7 +1618,6 @@ class MklQuantizedConv2DOp
  }
  PersistentTensor cached_bias_data_ptensor_ GUARDED_BY(mu_);
  - PersistentTensor cached_bias_md_ptensor_ GUARDED_BY(mu_);
  memory* input_bias_ = nullptr;
  memory* scaled_bias_ = nullptr;
  @@ -1637,17 +1636,6 @@ private:
  OP_REQUIRES_OK(context, context->allocate_persistent(
  DataTypeToEnum<Tbias>::value, bias_tf_shape,
  &cached_bias_data_ptensor_, bias_tensor));
  -
  - Tensor* second_tensor = nullptr;
  - TensorShape bias_mkl_format;
  - bias_mkl_format.AddDim(
  - sizeof(conv_prim_desc.bias_primitive_desc().desc().data.format) /
  - sizeof(DT_INT32));
  - OP_REQUIRES_OK(context, context->allocate_persistent(
  - DT_INT32, bias_mkl_format,
  - &cached_bias_md_ptensor_, &second_tensor));
  - second_tensor->scalar<int32>()() =
  - conv_prim_desc.bias_primitive_desc().desc().data.format;
  }
  // LOCKS_EXCLUDED annotation ensures that the lock (mu_) cannot
  @@ -1690,8 +1678,6 @@ private:
  tf_shared_lock lock(mu_);
  const Tensor& cached_bias_data =
  *cached_bias_data_ptensor_.AccessTensor(context);
  - const Tensor& cached_bias_md =
  - *cached_bias_md_ptensor_.AccessTensor(context);
  return static_cast<Tbias*>(
  const_cast<Tbias*>(cached_bias_data.flat<Tbias>().data()));
  