CLN: remove DatetimelikeDelegateMixin (pandas-dev#31480)

Author: jbrockmendel

pandas/core/indexes/datetimelike.py

@@ -1,8 +1,7 @@
 """
 Base and utility classes for tseries type pandas objects.
 """
-import operator
-from typing import Any, List, Optional, Set, Union
+from typing import Any, List, Optional, Union
 
 import numpy as np
 
@@ -30,7 +29,6 @@
 from pandas.core.dtypes.missing import is_valid_nat_for_dtype, isna
 
 from pandas.core import algorithms
-from pandas.core.accessor import PandasDelegate
 from pandas.core.arrays import DatetimeArray, PeriodArray, TimedeltaArray
 from pandas.core.arrays.datetimelike import DatetimeLikeArrayMixin
 from pandas.core.base import _shared_docs
@@ -932,42 +930,3 @@ def insert(self, loc, item):
             raise TypeError(
                 f"cannot insert {type(self).__name__} with incompatible label"
             )
-
-
-class DatetimelikeDelegateMixin(PandasDelegate):
-    """
-    Delegation mechanism, specific for Datetime, Timedelta, and Period types.
-
-    Functionality is delegated from the Index class to an Array class. A
-    few things can be customized
-
-    * _delegated_methods, delegated_properties : List
-        The list of property / method names being delagated.
-    * raw_methods : Set
-        The set of methods whose results should should *not* be
-        boxed in an index, after being returned from the array
-    * raw_properties : Set
-        The set of properties whose results should should *not* be
-        boxed in an index, after being returned from the array
-    """
-
-    # raw_methods : dispatch methods that shouldn't be boxed in an Index
-    _raw_methods: Set[str] = set()
-    # raw_properties : dispatch properties that shouldn't be boxed in an Index
-    _raw_properties: Set[str] = set()
-    _data: Union[DatetimeArray, TimedeltaArray, PeriodArray]
-
-    def _delegate_property_get(self, name, *args, **kwargs):
-        result = getattr(self._data, name)
-        if name not in self._raw_properties:
-            result = Index(result, name=self.name)
-        return result
-
-    def _delegate_property_set(self, name: str, value, *args, **kwargs):
-        setattr(self._data, name, value)
-
-    def _delegate_method(self, name, *args, **kwargs):
-        result = operator.methodcaller(name, *args, **kwargs)(self._data)
-        if name not in self._raw_methods:
-            result = Index(result, name=self.name)
-        return result