Fix linting issues.

cutekit/const.py

@@ -1,5 +1,4 @@
 import os
-import sys
 
 from . import utils
 

cutekit/shell.py

@@ -13,7 +13,7 @@ import tempfile
 import dataclasses as dt
 
 from pathlib import Path
-from typing import Literal, Optional
+from typing import Optional
 from . import cli, const
 
 _logger = logging.getLogger(__name__)

tests/test_cli.py

@@ -1,9 +1,7 @@
 from cutekit import cli, utils
 from asserts import (
     assert_is,
-    assert_true,
     assert_equal,
-    assert_raises,
     assert_is_instance,
 )