remove torchao.autoquant from transformers (#43561)
Summary:
This is being deprecated: https://github.com/huggingface/diffusers/pull/13048
Test Plan:
```python
RUN_SLOW=1 pytest tests/quantization/torchao_integration/test_torchao.py -s
```
Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>
