Revert "Fix bug when loading 4bit checkpoint quantized in INC (huggingface#1447)"

This reverts commit 4bdf434.

Author: xin3he

examples/text-generation/utils.py

@@ -269,9 +269,6 @@ def setup_model(args, model_dtype, model_kwargs, logger):
             original_model=org_model,
             **model_kwargs,
         )
-        # TODO: This will be removed in v1.19 Synapse release
-        # the loaded model should have the same dtype as original_model
-        model = model.to(model_kwargs["torch_dtype"])
     else:
         if args.assistant_model is not None:
             assistant_model = AutoModelForCausalLM.from_pretrained(