Remove old group imports

Author: dstansby

src/zarr/group.py

@@ -31,10 +31,6 @@
 from zarr.store import StoreLike, StorePath, make_store_path
 from zarr.sync import SyncMixin, sync
 
-if TYPE_CHECKING:
-    from collections.abc import AsyncGenerator, Iterable
-    from typing import Any, Literal
-
 logger = logging.getLogger("zarr.group")