CLN: Remove Index.sort (#59283)

doc/source/whatsnew/v3.0.0.rst

@@ -236,6 +236,7 @@ Other API changes
 - All classes inheriting from builtin ``tuple`` (including types created with :func:`collections.namedtuple`) are now hashed and compared as builtin ``tuple`` during indexing operations (:issue:`57922`)
 - Made ``dtype`` a required argument in :meth:`ExtensionArray._from_sequence_of_strings` (:issue:`56519`)
 - Passing a :class:`Series` input to :func:`json_normalize` will now retain the :class:`Series` :class:`Index`, previously output had a new :class:`RangeIndex` (:issue:`51452`)
+- Removed :meth:`Index.sort` which always raised a ``TypeError``. This attribute is not defined and will raise an ``AttributeError`` (:issue:`59283`)
 - Updated :meth:`DataFrame.to_excel` so that the output spreadsheet has no styling. Custom styling can still be done using :meth:`Styler.to_excel` (:issue:`54154`)
 - pickle and HDF (``.h5``) files created with Python 2 are no longer explicitly supported (:issue:`57387`)
 - pickled objects from pandas version less than ``1.0.0`` are no longer supported (:issue:`57155`)

pandas/core/indexes/base.py

@@ -5785,13 +5785,6 @@ def sort_values(
         else:
             return sorted_index
 
-    @final
-    def sort(self, *args, **kwargs):
-        """
-        Use sort_values instead.
-        """
-        raise TypeError("cannot sort an Index object in-place, use sort_values instead")
-
     def shift(self, periods: int = 1, freq=None) -> Self:
         """
         Shift index by desired number of time frequency increments.

pandas/tests/indexes/test_any_index.py

@@ -22,12 +22,6 @@ def test_boolean_context_compat(index):
         bool(index)
 
 
-def test_sort(index):
-    msg = "cannot sort an Index object in-place, use sort_values instead"
-    with pytest.raises(TypeError, match=msg):
-        index.sort()
-
-
 def test_hash_error(index):
     with pytest.raises(TypeError, match=f"unhashable type: '{type(index).__name__}'"):
         hash(index)