diff --git a/src/indobenchmark/tokenization_indonlg.py b/src/indobenchmark/tokenization_indonlg.py
index f64447f..65601c8 100644
--- a/src/indobenchmark/tokenization_indonlg.py
+++ b/src/indobenchmark/tokenization_indonlg.py
@@ -15,37 +15,19 @@
 """ Tokenization classes for IndoNLG model."""
 
 import os
-from shutil import copyfile
 from typing import TYPE_CHECKING, Any, Dict, List, NamedTuple, Optional, Sequence, Tuple, Union
 from transformers import PreTrainedTokenizer, BatchEncoding
 
 from collections.abc import Mapping
 from transformers.utils import (
-    EntryNotFoundError,
-    ExplicitEnum,
     PaddingStrategy,
-    PushToHubMixin,
-    RepositoryNotFoundError,
-    RevisionNotFoundError,
     TensorType,
-    add_end_docstrings,
-    cached_path,
-    copy_func,
-    get_file_from_repo,
-    hf_bucket_url,
-    is_flax_available,
-    is_offline_mode,
-    is_remote_url,
     is_tf_available,
-    is_tokenizers_available,
     is_torch_available,
     logging,
     to_py_obj,
-    torch_required,
 )
 import sentencepiece as spm
-
-from transformers.utils import logging
 from transformers.utils.generic import _is_jax, _is_numpy, _is_tensorflow, _is_torch, _is_torch_device
 
 logger = logging.get_logger(__name__)