[Fix][SLM] Update q4f16 quantization with the new mutator name rule (mlc-ai#1178)

[Fix] Update q4f16 quantization with the new mutator name rule

Author: LeshengJin

python/mlc_chat/compiler/parameter/utils.py

@@ -40,7 +40,6 @@ def quantize(self, name: str, param: "NDArray") -> Optional[Iterator[Tuple[str,
             The quantized parameters, each with its name, returns None if the parameter is not
             quantized.
         """
-        name = f".{name}"
         if name not in self.quantize_map.param_map:
             return None
         assert name in self.quantize_map.map_func, f"Quantization function for {name} not found."