DOC: Remove doc of deprecated week and weekofyear

doc/source/user_guide/timeseries.rst

@@ -797,8 +797,6 @@ There are several time/date properties that one can access from ``Timestamp`` or
     timetz,"Returns datetime.time as local time with timezone information"
     dayofyear,"The ordinal day of year"
     day_of_year,"The ordinal day of year"
-    weekofyear,"The week ordinal of the year"
-    week,"The week ordinal of the year"
     dayofweek,"The number of the day of the week with Monday=0, Sunday=6"
     day_of_week,"The number of the day of the week with Monday=0, Sunday=6"
     weekday,"The number of the day of the week with Monday=0, Sunday=6"
@@ -812,6 +810,10 @@ There are several time/date properties that one can access from ``Timestamp`` or
     is_year_end,"Logical indicating if last day of year (defined by frequency)"
     is_leap_year,"Logical indicating if the date belongs to a leap year"
 
+.. note::
+
+   You can use ``DatetimeIndex.isocalendar().week`` to access week of year date information.
+
 Furthermore, if you have a ``Series`` with datetimelike values, then you can
 access these properties via the ``.dt`` accessor, as detailed in the section
 on :ref:`.dt accessors<basics.dt_accessors>`.