remove reference to deprecated import (#2407)

src/axolotl/utils/models.py

@@ -24,7 +24,6 @@ from peft import (
     PeftModelForCausalLM,
     prepare_model_for_kbit_training,
 )
-from peft.tuners.lora import QuantLinear
 from torch import nn
 from transformers import (  # noqa: F401
     AddedToken,
@@ -1360,7 +1359,7 @@ def load_llama_adapter(model, cfg):
 
 
 def find_all_linear_names(model):
-    cls = (bnb.nn.Linear4bit, bnb.nn.Linear8bitLt, torch.nn.Linear, QuantLinear)
+    cls = (bnb.nn.Linear4bit, bnb.nn.Linear8bitLt, torch.nn.Linear)
     lora_module_names = set()
     for name, module in model.named_modules():
         if (