[pre-commit.ci] auto fixes from pre-commit.com hooks

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mypy/binder.py

@@ -2,7 +2,7 @@
 
 from collections import defaultdict
 from contextlib import contextmanager
-from typing import DefaultDict, Iterator, List, Optional, Tuple, Union, cast, Iterable, Container
+from typing import DefaultDict, Iterator, List, Optional, Tuple, Union, cast
 from typing_extensions import TypeAlias as _TypeAlias
 
 from mypy.erasetype import remove_instance_last_known_values