CLN: Drop .sortlevel method (pandas-dev#23375)

xref pandas-devgh-15099.

doc/source/whatsnew/v0.24.0.txt

@@ -951,6 +951,7 @@ Removal of prior version deprecations/changes
 - :meth:`DataFrame.consolidate` and :meth:`Series.consolidate` have been removed (:issue:`15501`)
 - Removal of the previously deprecated module ``pandas.json`` (:issue:`19944`)
 - :meth:`SparseArray.get_values` and :meth:`SparseArray.to_dense` have dropped the ``fill`` parameter (:issue:`14686`)
+- :meth:`DataFrame.sortlevel` and :meth:`Series.sortlevel` have been removed (:issue:`15099`)
 - :meth:`SparseSeries.to_dense` has dropped the ``sparse_only`` parameter (:issue:`14686`)
 
 .. _whatsnew_0240.performance:

pandas/core/frame.py

@@ -361,7 +361,7 @@ def _constructor(self):
 
     _constructor_sliced = Series
     _deprecations = NDFrame._deprecations | frozenset(
-        ['sortlevel', 'get_value', 'set_value', 'from_csv', 'from_items'])
+        ['get_value', 'set_value', 'from_csv', 'from_items'])
     _accessors = set()
 
     @property
@@ -4645,40 +4645,6 @@ def sort_index(self, axis=0, level=None, ascending=True, inplace=False,
         else:
             return self._constructor(new_data).__finalize__(self)
 
-    def sortlevel(self, level=0, axis=0, ascending=True, inplace=False,
-                  sort_remaining=True):
-        """Sort multilevel index by chosen axis and primary level. Data will be
-        lexicographically sorted by the chosen level followed by the other
-        levels (in order).
-
-        .. deprecated:: 0.20.0
-            Use :meth:`DataFrame.sort_index`
-
-
-        Parameters
-        ----------
-        level : int
-        axis : {0 or 'index', 1 or 'columns'}, default 0
-        ascending : boolean, default True
-        inplace : boolean, default False
-            Sort the DataFrame without creating a new instance
-        sort_remaining : boolean, default True
-            Sort by the other levels too.
-
-        Returns
-        -------
-        sorted : DataFrame
-
-        See Also
-        --------
-        DataFrame.sort_index(level=...)
-
-        """
-        warnings.warn("sortlevel is deprecated, use sort_index(level= ...)",
-                      FutureWarning, stacklevel=2)
-        return self.sort_index(level=level, axis=axis, ascending=ascending,
-                               inplace=inplace, sort_remaining=sort_remaining)
-
     def nlargest(self, n, columns, keep='first'):
         """
         Return the first `n` rows ordered by `columns` in descending order.

pandas/core/series.py

@@ -145,7 +145,7 @@ class Series(base.IndexOpsMixin, generic.NDFrame):
     _metadata = ['name']
     _accessors = {'dt', 'cat', 'str', 'sparse'}
     _deprecations = generic.NDFrame._deprecations | frozenset(
-        ['asobject', 'sortlevel', 'reshape', 'get_value', 'set_value',
+        ['asobject', 'reshape', 'get_value', 'set_value',
          'from_csv', 'valid'])
 
     # Override cache_readonly bc Series is mutable
@@ -2962,33 +2962,6 @@ def nsmallest(self, n=5, keep='first'):
         """
         return algorithms.SelectNSeries(self, n=n, keep=keep).nsmallest()
 
-    def sortlevel(self, level=0, ascending=True, sort_remaining=True):
-        """Sort Series with MultiIndex by chosen level. Data will be
-        lexicographically sorted by the chosen level followed by the other
-        levels (in order),
-
-        .. deprecated:: 0.20.0
-            Use :meth:`Series.sort_index`
-
-        Parameters
-        ----------
-        level : int or level name, default None
-        ascending : bool, default True
-
-        Returns
-        -------
-        sorted : Series
-
-        See Also
-        --------
-        Series.sort_index(level=...)
-
-        """
-        warnings.warn("sortlevel is deprecated, use sort_index(level=...)",
-                      FutureWarning, stacklevel=2)
-        return self.sort_index(level=level, ascending=ascending,
-                               sort_remaining=sort_remaining)
-
     def swaplevel(self, i=-2, j=-1, copy=True):
         """
         Swap levels i and j in a MultiIndex

pandas/tests/frame/test_sorting.py

@@ -21,14 +21,6 @@
 
 class TestDataFrameSorting(TestData):
 
-    def test_sort(self):
-        frame = DataFrame(np.arange(16).reshape(4, 4), index=[1, 2, 3, 4],
-                          columns=['A', 'B', 'C', 'D'])
-
-        # see gh-9816
-        with tm.assert_produces_warning(FutureWarning):
-            frame.sortlevel()
-
     def test_sort_values(self):
         frame = DataFrame([[1, 1, 2], [3, 1, 0], [4, 5, 6]],
                           index=[1, 2, 3], columns=list('ABC'))

pandas/tests/series/test_sorting.py

@@ -15,13 +15,6 @@
 
 class TestSeriesSorting(TestData):
 
-    def test_sortlevel_deprecated(self):
-        ts = self.ts.copy()
-
-        # see gh-9816
-        with tm.assert_produces_warning(FutureWarning):
-            ts.sortlevel()
-
     def test_sort_values(self):
 
         # check indexes are reordered corresponding with the values