Removed unnecessary sentence.

Author: benjaminr

pandas/core/frame.py

@@ -5670,7 +5670,6 @@ def pivot(self, index=None, columns=None, values=None):
             Name of the row / column that will contain the totals
             when margins is True.
         observed : boolean, default False
-            This option is passed to calls to groupby.
             This only applies if any of the groupers are Categoricals.
             If True: only show observed values for categorical groupers.
             If False: show all values for categorical groupers.