Backport PR pandas-dev#44851: DOC: 1.3.5 release date

Author: simonjayhawkins

doc/source/whatsnew/v1.3.5.rst

@@ -1,6 +1,6 @@
 .. _whatsnew_135:
 
-What's new in 1.3.5 (November ??, 2021)
+What's new in 1.3.5 (December 12, 2021)
 ---------------------------------------
 
 These are the changes in pandas 1.3.5. See :ref:`release` for a full changelog
@@ -25,24 +25,6 @@ Fixed regressions
 
 .. ---------------------------------------------------------------------------
 
-.. _whatsnew_135.bug_fixes:
-
-Bug fixes
-~~~~~~~~~
--
--
-
-.. ---------------------------------------------------------------------------
-
-.. _whatsnew_135.other:
-
-Other
-~~~~~
--
--
-
-.. ---------------------------------------------------------------------------
-
 .. _whatsnew_135.contributors:
 
 Contributors