Update sample_finetune.py

sample_finetune.py

@@ -151,9 +151,6 @@ def apply_chat_template(
     tokenizer,
 ):
     messages = example["messages"]
-    # Add an empty system message if there is none
-    if messages[0]["role"] != "system":
-        messages.insert(0, {"role": "system", "content": ""})
     example["text"] = tokenizer.apply_chat_template(
         messages, tokenize=False, add_generation_prompt=False)
     return example