Deprecate and remove subclass.py, dynamic_quant.py, and weight_only.py #2745
Description
These 3 files contain old quantization flows that are not really supported, but they are not even deprecated as of this issue:
- Deprecate subclass.py
- Deprecate dynamic_quant.py
- Deprecate weight_only.py
- Remove subclass.py
- Remove dynamic_quant.py
- Remove weight_only.py