onnxruntime

268d2283 - Export GPT-2 ONNX model without postion_ids and attention_mask inputs (#4852)

Export GPT-2 ONNX model without postion_ids and attention_mask inputs (#4852) * Export GPT-2 ONNX model without postion_ids and attention_mask inputs * allow benchmark_gpt2 on user's model * refactor: get_dummy_inputs returns a data class.