remove PeftTrainer

Former-commit-id: cc0cff3e991f194732d278e627648e528118a719

src/llmtuner/tuner/pt/workflow.py

@@ -2,12 +2,11 @@
 
 import math
 from typing import TYPE_CHECKING, Optional, List
-from transformers import DataCollatorForLanguageModeling
+from transformers import DataCollatorForLanguageModeling, Trainer
 
 from llmtuner.dsets import get_dataset, preprocess_dataset, split_dataset
 from llmtuner.extras.ploting import plot_loss
 from llmtuner.tuner.core import load_model_and_tokenizer
-from llmtuner.tuner.core.trainer import PeftTrainer
 
 if TYPE_CHECKING:
     from transformers import Seq2SeqTrainingArguments, TrainerCallback
@@ -27,8 +26,7 @@ def run_pt(
     data_collator = DataCollatorForLanguageModeling(tokenizer=tokenizer, mlm=False)
 
     # Initialize our Trainer
-    trainer = PeftTrainer(
-        finetuning_args=finetuning_args,
+    trainer = Trainer(
         model=model,
         args=training_args,
         tokenizer=tokenizer,