update get template

src/llamafactory/hparams/data_args.py

@@ -113,10 +113,6 @@ class DataArguments:
         default=None,
         metadata={"help": "Path to save or load the tokenized datasets."},
     )
-    dataset_map_batch_size: Optional[int] = field(
-        default=None,
-        metadata={"help": "Batch size for dataset mapping."},
-    )
 
     def __post_init__(self):
         def split_arg(arg):