fix: change the default model_name_or_path from "facebook/opt-125m" to None

This is especially relevant when using the offline dataset
processing script where it's easy to forget to specify the model_name_or_path

Signed-off-by: Harikrishnan Balagopal <harikrishmenon@gmail.com>

Author: HarikrishnanBalagopal

tuning/config/configs.py

@@ -35,7 +35,7 @@
 
 @dataclass
 class ModelArguments:
-    model_name_or_path: Optional[str] = field(default="facebook/opt-125m")
+    model_name_or_path: Optional[str] = field(default=None)
     use_flash_attn: bool = field(
         default=True,
         metadata={"help": "Use Flash attention v2 from transformers, default is True"},