Undo typevar test

Author: melonora

src/spatialdata/datasets.py

@@ -1,6 +1,5 @@
 """SpatialData datasets."""
-from abc import ABC
-from typing import Any, Optional, TypeVar, Union
+from typing import Any, Optional, Union
 
 import numpy as np
 import pandas as pd
@@ -25,8 +24,6 @@
 )
 from spatialdata.transformations import Identity
 
-T = TypeVar("T", bound=ABC)
-
 __all__ = ["blobs", "raccoon"]