Address requested changes

Author: Albert Villanova del Moral

doc/source/whatsnew/v0.20.0.txt

@@ -308,7 +308,6 @@ Other enhancements
 - ``pd.types.concat.union_categoricals`` gained the ``ignore_ordered`` argument to allow ignoring the ordered attribute of unioned categoricals (:issue:`13410`). See the :ref:`categorical union docs <categorical.union>` for more information.
 - ``pandas.io.json.json_normalize()`` with an empty ``list`` will return an empty ``DataFrame`` (:issue:`15534`)
 - ``pd.DataFrame.to_latex`` and ``pd.DataFrame.to_string`` now allow optional header aliases. (:issue:`15536`)
-- ``Index.join()`` accepts parameter ``sort`` (:issue:`15582`)
 
 
 .. _ISO 8601 duration: https://en.wikipedia.org/wiki/ISO_8601#Durations
@@ -714,11 +713,9 @@ Index order after inner join due to Index intersection
 
 The ``Index.intersection`` now preserves the order of the calling Index (left)
 instead of the other Index (right) (:issue:`15582`). This affects the inner
-joins (methods ``Index.join``, ``DataFrame.join``, ``DataFrame.merge`` and
-``pd.merge``) and the alignments with inner join (methods ``Series.align`` and
-``DataFrame.align``).
+joins (methods ``DataFrame.join`` and ``pd.merge``) and the .align methods.
 
-- ``Index.intersection`` and ``Index.join``
+- ``Index.intersection``
 
   .. ipython:: python
 
@@ -734,52 +731,13 @@ joins (methods ``Index.join``, ``DataFrame.join``, ``DataFrame.merge`` and
      In [4]: idx1.intersection(idx2)
      Out[4]: Int64Index([1, 2], dtype='int64')
 
-     In [5]: idx1.join(idx2, how='inner')
-     Out[5]: Int64Index([1, 2], dtype='int64')
-
   New Behavior:
 
   .. ipython:: python
 
      idx1.intersection(idx2)
-     idx1.join(idx2, how='inner')
 
-- ``Series.align``
-
-  .. ipython:: python
-
-     s1 = pd.Series([20, 10, 0], index=[2, 1, 0])
-     s1
-     s2 = pd.Series([100, 200, 300], index=[1, 2, 3])
-     s2
-
-  Previous Behavior:
-
-  .. code-block:: ipython
-
-     In [4]: (res1, res2) = s1.align(s2, join='inner')
-
-     In [5]: res1
-     Out[5]:
-     1    10
-     2    20
-     dtype: int64
-
-     In [6]: res2
-     Out[6]:
-     1    100
-     2    200
-     dtype: int64
-
-  New Behavior:
-
-  .. ipython:: python
-
-     (res1, res2) = s1.align(s2, join='inner')
-     res1
-     res2
-
-- ``DataFrame.join``, ``DataFrame.merge`` and ``pd.merge``
+- ``DataFrame.join`` and ``pd.merge``
 
   .. ipython:: python
 
@@ -798,41 +756,18 @@ joins (methods ``Index.join``, ``DataFrame.join``, ``DataFrame.merge`` and
      1  10  100
      2  20  200
 
-     In [5]: df1.merge(df2, how='inner', left_index=True, right_index=True)
+     In [5]: pd.merge(df1, df2, how='inner', left_index=True, right_index=True)
      Out[5]:
          a    b
      1  10  100
      2  20  200
 
-     In [6]: pd.merge(df1, df2, how='inner', left_index=True, right_index=True)
-     Out[6]:
-         a    b
-     1  10  100
-     2  20  200
-
-     In [7]: (res1, res2) = df1.align(df2, axis=0, join='inner')
-
-     In [8]: res1
-     Out[8]:
-         a
-     1  10
-     2  20
-
-     In [9]: res2
-     Out[9]:
-          b
-     1  100
-     2  200
-
   New Behavior:
 
   .. ipython:: python
 
      df1.join(df2, how='inner')
-     df1.merge(df2, how='inner', left_index=True, right_index=True)
-     (res1, res2) = df1.align(df2, axis=0, join='inner')
-     res1
-     res2
+     pd.merge(df1, df2, how='inner', left_index=True, right_index=True)
 
 
 .. _whatsnew_0200.api:
@@ -1055,4 +990,4 @@ Bug Fixes
 - Bug in ``pd.melt()`` where passing a tuple value for ``value_vars`` caused a ``TypeError`` (:issue:`15348`)
 - Bug in ``.eval()`` which caused multiline evals to fail with local variables not on the first line (:issue:`15342`)
 - Bug in ``pd.read_msgpack`` which did not allow to load dataframe with an index of type ``CategoricalIndex`` (:issue:`15487`)
-- Bug with ``sort=True`` in ``DataFrame.join``, ``DataFrame.merge`` and ``pd.merge`` when joining on index (:issue:`15582`)
+- Bug with ``sort=True`` in ``DataFrame.join`` and ``pd.merge`` when joining on indexes (:issue:`15582`)