[quant][fx] Removing more unused code (#74603)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/74603
att
Test Plan:
python test/test_quantization.py TestQuantizeFx
python test/test_quantization.py TestQuantizeFxOps
Imported from OSS
Reviewed By: andrewor14
Differential Revision: D35071546
fbshipit-source-id: 273a7f0cb2a8f306864eb118916056fad3bb1399
(cherry picked from commit 9c31a50a2bccb2e5b7a5db833085a75e5ebda707)
