Remove unsupported opacity kwarg from pie-like functions

Author: nicolaskruchten

Diff for: packages/python/plotly/plotly/express/_chart_types.py

@@ -1234,7 +1234,6 @@ def pie(
     template=None,
     width=None,
     height=None,
-    opacity=None,
     hole=None,
 ):
     """
@@ -1423,7 +1422,6 @@ def funnel_area(
     template=None,
     width=None,
     height=None,
-    opacity=None,
 ):
     """
     In a funnel area plot, each row of `data_frame` is represented as a