[del] Delete unused typing 'SplittingFunc'

Author: nabenabe0928

autoPyTorch/datasets/resampling_strategy.py

@@ -16,9 +16,6 @@
 from typing_extensions import Protocol
 
 
-SplitFunc = Callable[[Union[int, float], np.ndarray, Any], List[Tuple[np.ndarray, np.ndarray]]]
-
-
 # Use callback protocol as workaround, since callable with function fields count 'self' as argument
 class CrossValFunc(Protocol):
     """TODO: This class is not required anymore, because CrossValTypes class does not require get_validators()"""