changes what's new to v 1.0.0 instead of 0.25.2

Author: datajanko

doc/source/whatsnew/v0.25.2.rst

@@ -6,13 +6,6 @@ What's new in 0.25.2 (October XX, 2019)
 These are the changes in pandas 0.25.2. See :ref:`release` for a full changelog
 including other versions of pandas.
 
-.. _whatsnew_0252.performance:
-
-Performance improvements
-~~~~~~~~~~~~~~~~~~~~~~~~
-
-- Improves :meth:`DataFrame.select_dtypes` performance by using vectorization instead of iterating over a loop. With this improvement :meth:`DataFrame.select_dtypes` becomes feasible for dataframes with lots of columns. (:issue:`28317`)
-
 .. _whatsnew_0252.bug_fixes:
 
 Bug fixes

doc/source/whatsnew/v1.0.0.rst

@@ -99,6 +99,7 @@ Performance improvements
 - Performance improvement in :func:`cut` when ``bins`` is an :class:`IntervalIndex` (:issue:`27668`)
 - Performance improvement in :meth:`DataFrame.corr` when ``method`` is ``"spearman"`` (:issue:`28139`)
 - Performance improvement in :meth:`DataFrame.replace` when provided a list of values to replace (:issue:`28099`)
+- Performance improvement in :meth:`DataFrame.select_dtypes` by using vectorization instead of iterating over a loop. With this improvement :meth:`DataFrame.select_dtypes` becomes feasible for dataframes with lots of columns. (:issue:`28317`)
 
 .. _whatsnew_1000.bug_fixes: