fix: remove arbitrary json from consolidated model

Author: d-v-b

packages/zarr-metadata/src/zarr_metadata/v2/consolidated.py

@@ -13,8 +13,6 @@
 if TYPE_CHECKING:
     from collections.abc import Mapping
 
-    from zarr_metadata.common import JSON
-
     from .array import ArrayMetadataV2
     from .group import GroupMetadataV2
 
@@ -29,7 +27,7 @@ class ConsolidatedMetadataV2(TypedDict):
     """
 
     zarr_consolidated_format: int
-    metadata: Mapping[str, GroupMetadataV2 | ArrayMetadataV2 | JSON]
+    metadata: Mapping[str, GroupMetadataV2 | ArrayMetadataV2]
 
 
 __all__ = [