fix: crash when pretraining_dataset with dispatch_batches is false (#2558)

src/axolotl/utils/data/sft.py

@@ -134,7 +134,6 @@ def prepare_dataset(cfg, tokenizer, processor=None, preprocess_iterable=None):
                     "csv", data_files=f.name, split="train", streaming=True
                 )
         else:
-            if is_local_main_process():
             iter_ds = load_dataset(
                 path, streaming=True, split=split, name=name, data_files=data_files
             )