Artyom Iudin

`Wav2Vec2Model` can't be exported with `torch.onnx.export()`

1

### 🐛 Describe the bug An attempt to export wav2vec model with this [pytorch guide](https://docs.pytorch.org/tutorials/beginner/onnx/export_simple_model_to_onnx_tutorial.html) fails. In Wav2Vec2 in forward call something wrong with layer_drop. If to take only main...