Update on "[quant][graphmode][fx] Add support for additional_{fusion/…

…quant}_pattern"

Summary:
Allow user to provide additional fusion/quant patterns for fx graph mode

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Differential Revision: [D24317437](https://our.internmc.facebook.com/intern/diff/D24317437)

[ghstack-poisoned]

torch/quantization/quantize_fx.py

@@ -1,6 +1,5 @@
 import torch
 from torch.fx import GraphModule  # type: ignore
-from torch.fx import symbolic_trace  # type: ignore
 from torch.fx.symbolic_trace import Tracer  # type: ignore
 from .fx import Fuser  # noqa: F401
 from .fx import Quantizer  # noqa: F401