pytorch

2bce6d09 - [Quant][fx][bc-breaking] Remove backend_config_utils.py (#89810)

[Quant][fx][bc-breaking] Remove backend_config_utils.py (#89810) Summary: Previously under torch/ao/quantization we have backend_config/utils.py and fx/backend_config_utils.py, which was confusing. This commit deletes the latter and moves everything there to more suitable util files. BC-breaking note: The following public APIs under the `torch.ao.quantization.fx.backend_config_utils` namespace are removed in this commit. ``` get_quantize_handler_cls get_fusion_pattern_to_fuse_handler_cls get_native_quant_patterns get_pattern_to_quantize_handlers ``` Test Plan: python test/test_quantization.py TestQuantizeFx python test/test_quantization.py TestQuantizeFxOps Reviewers: jerryzh168, vkuzo Subscribers: jerryzh168, vkuzo Pull Request resolved: https://github.com/pytorch/pytorch/pull/89810 Approved by: https://github.com/jerryzh168