DOC: remove function-level doc of tz_convert(None) and tz_localize(None)

Author: georeth

pandas/core/generic.py

@@ -10133,8 +10133,6 @@ def tz_convert(
         """
         Convert tz-aware axis to target time zone.
 
-        To convert to UTC and get a tz-naive axis, pass tz=None.
-
         Parameters
         ----------
         tz : str or tzinfo object or None
@@ -10204,9 +10202,6 @@ def tz_localize(
         This operation localizes the Index. To localize the values in a
         timezone-naive Series, use :meth:`Series.dt.tz_localize`.
 
-        This method can also used to do the inverse -- to get a tz-naive index
-        from a time zone aware index, pass tz=None.
-
         Parameters
         ----------
         tz : str or tzinfo or None