⚠️ Time to say goodbye to py37 (#24091)

* fix

---------

Co-authored-by: ydshieh <ydshieh@users.noreply.github.com>

tests/utils/test_hf_argparser.py

@@ -22,7 +22,7 @@ from argparse import Namespace
 from dataclasses import dataclass, field
 from enum import Enum
 from pathlib import Path
-from typing import List, Optional
+from typing import List, Literal, Optional
 
 import yaml
 
@@ -30,13 +30,6 @@ from transformers import HfArgumentParser, TrainingArguments
 from transformers.hf_argparser import make_choice_type_function, string_to_bool
 
 
-try:
-    # For Python versions <3.8, Literal is not in typing: https://peps.python.org/pep-0586/
-    from typing import Literal
-except ImportError:
-    # For Python 3.7
-    from typing_extensions import Literal
-
 # Since Python 3.10, we can use the builtin `|` operator for Union types
 # See PEP 604: https://peps.python.org/pep-0604
 is_python_no_less_than_3_10 = sys.version_info >= (3, 10)