Partially revert "Unused import"

This reverts commit ff13739393b2f1926b18b4019cc642f5d9ed3dafi partially.

Author: DimitriPapadopoulos

src/zarr/api/asynchronous.py

@@ -37,7 +37,7 @@
     GroupMetadata,
     create_hierarchy,
 )
-from zarr.core.metadata import ArrayV2Metadata, ArrayV3Metadata
+from zarr.core.metadata import ArrayMetadataDict, ArrayV2Metadata, ArrayV3Metadata
 from zarr.core.metadata.v2 import _default_compressor, _default_filters
 from zarr.errors import GroupNotFoundError, NodeTypeValidationError
 from zarr.storage._common import make_store_path

src/zarr/codecs/crc32c_.py

@@ -4,6 +4,7 @@
 from typing import TYPE_CHECKING, cast
 
 import numpy as np
+import typing_extensions
 from crc32c import crc32c
 
 from zarr.abc.codec import BytesBytesCodec