Revert "Backwards compatibility shim"

This reverts commit 2a6186f.

Author: maxrjones

src/zarr/core/chunk_grids.py

@@ -786,27 +786,3 @@ def _auto_partition(
             _shards_out = cast("tuple[int, ...]", shard_shape)
 
     return _shards_out, _chunks_out
-
-
-# -- Backwards-compatibility shim --
-# Downstream packages (tifffile, cubed, ismip-indexing) import RegularChunkGrid
-# from this module. Emit a deprecation warning and redirect to the metadata class.
-
-_DEPRECATED_NAMES = {
-    "RegularChunkGrid": "RegularChunkGridMetadata",
-}
-
-
-def __getattr__(name: str) -> Any:
-    if name in _DEPRECATED_NAMES:
-        new_name = _DEPRECATED_NAMES[name]
-        import zarr.core.metadata.v3 as v3_mod
-
-        warnings.warn(
-            f"Importing {name} from zarr.core.chunk_grids is deprecated. "
-            f"Use zarr.core.metadata.v3.{new_name} instead.",
-            DeprecationWarning,
-            stacklevel=2,
-        )
-        return getattr(v3_mod, new_name)
-    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")

tests/test_unified_chunk_grid.py

@@ -2853,37 +2853,3 @@ def test_property_block_indexing_rectilinear(data: st.DataObject) -> None:
             a[tuple(sel)],
             err_msg=f"dim={dim}, block={block_ix}",
         )
-
-
-# ---------------------------------------------------------------------------
-# Backwards-compatibility: import RegularChunkGrid from zarr.core.chunk_grids
-# ---------------------------------------------------------------------------
-# Downstream packages (tifffile, cubed, ismip-indexing) use this pattern:
-#   from zarr.core.chunk_grids import RegularChunkGrid
-#   RegularChunkGrid(chunk_shape=(...))
-
-
-def test_regular_chunk_grid_import_from_chunk_grids() -> None:
-    """RegularChunkGrid can be imported from zarr.core.chunk_grids with deprecation warning."""
-    with pytest.warns(DeprecationWarning, match="RegularChunkGrid"):
-        from zarr.core.chunk_grids import RegularChunkGrid
-
-    assert RegularChunkGrid is RegularChunkGridMetadata
-
-
-def test_regular_chunk_grid_construction_from_chunk_grids() -> None:
-    """RegularChunkGrid(chunk_shape=...) works when imported from zarr.core.chunk_grids."""
-    with pytest.warns(DeprecationWarning, match="RegularChunkGrid"):
-        from zarr.core.chunk_grids import RegularChunkGrid
-
-    grid = RegularChunkGrid(chunk_shape=(10, 20))
-    assert grid.chunk_shape == (10, 20)
-
-
-def test_regular_chunk_grid_isinstance_from_chunk_grids() -> None:
-    """isinstance check works for RegularChunkGrid imported from zarr.core.chunk_grids."""
-    with pytest.warns(DeprecationWarning, match="RegularChunkGrid"):
-        from zarr.core.chunk_grids import RegularChunkGrid
-
-    grid = RegularChunkGrid(chunk_shape=(10, 20))
-    assert isinstance(grid, RegularChunkGrid)