whatsnew, remove _ix

doc/source/whatsnew/v1.0.0.rst

@@ -501,6 +501,7 @@ or ``matplotlib.Axes.plot``. See :ref:`plotting.formatters` for more.
 
 - Floordiv of integer-dtyped array by :class:`Timedelta` now raises ``TypeError`` (:issue:`21036`)
 - :func:`pandas.api.types.infer_dtype` argument ``skipna`` defaults to ``True`` instead of ``False`` (:issue:`24050`)
+- Removed the previously deprecated :attr:`Series.ix` and :attr:`DataFrame.ix` (:issue:`26438`)
 - Removed the previously deprecated :meth:`Index.summary` (:issue:`18217`)
 - Removed the previously deprecated "fastpath" keyword from the :class:`Index` constructor (:issue:`23110`)
 - Removed the previously deprecated :meth:`Series.get_value`, :meth:`Series.set_value`, :meth:`DataFrame.get_value`, :meth:`DataFrame.set_value` (:issue:`17739`)

pandas/core/generic.py

@@ -321,9 +321,6 @@ def _setup_axes(
         # typ
         setattr(cls, "_typ", cls.__name__.lower())
 
-        # indexing support
-        cls._ix = None
-
         if info_axis is not None:
             cls._info_axis_number = info_axis
             cls._info_axis_name = axes[info_axis]