remove redundant test function

Author: d-v-b

tests/test_array.py

@@ -14,7 +14,6 @@
 from zarr import Array, AsyncArray, Group
 from zarr.codecs import BytesCodec, VLenBytesCodec, ZstdCodec
 from zarr.codecs.gzip import GzipCodec
-from zarr.codecs.sharding import ShardingCodec
 from zarr.codecs.transpose import TransposeCodec
 from zarr.core._info import ArrayInfo
 from zarr.core.array import (
@@ -29,12 +28,10 @@
 from zarr.core.buffer import default_buffer_prototype
 from zarr.core.buffer.cpu import NDBuffer
 from zarr.core.chunk_grids import _auto_partition
-from zarr.core.codec_pipeline import BatchedCodecPipeline
 from zarr.core.common import JSON, MemoryOrder, ZarrFormat
 from zarr.core.group import AsyncGroup
 from zarr.core.indexing import ceildiv
-from zarr.core.metadata.v2 import ArrayV2Metadata
-from zarr.core.metadata.v3 import ArrayV3Metadata, DataType
+from zarr.core.metadata.v3 import DataType
 from zarr.core.sync import sync
 from zarr.errors import ContainsArrayError, ContainsGroupError
 from zarr.storage import LocalStore, MemoryStore
@@ -897,27 +894,6 @@ async def test_nbytes(
         assert arr.nbytes == np.prod(arr.shape) * arr.dtype.itemsize
 
 
-def _get_partitioning(
-    data: AsyncArray[ArrayV2Metadata] | AsyncArray[ArrayV3Metadata],
-) -> tuple[tuple[int, ...], tuple[int, ...] | None]:
-    """
-    Get the shard shape and chunk shape of an array. If the array is not sharded, the shard shape
-    will be None.
-    """
-
-    shard_shape: tuple[int, ...] | None
-    chunk_shape: tuple[int, ...]
-    codecs = data.codec_pipeline
-    if isinstance(codecs, BatchedCodecPipeline):
-        if isinstance(codecs.array_bytes_codec, ShardingCodec):
-            chunk_shape = codecs.array_bytes_codec.chunk_shape
-            shard_shape = data.chunks
-        else:
-            chunk_shape = data.chunks
-            shard_shape = None
-    return chunk_shape, shard_shape
-
-
 @pytest.mark.parametrize(
     ("array_shape", "chunk_shape"),
     [((256,), (2,))],