DOC: removed .value_counts() and .nunique() from the docs for 'table methods available only for SeriesGroupBy' objects. GH46670 (pandas-dev#46701)

Author: TarunRKaushik

doc/source/reference/groupby.rst

@@ -132,9 +132,7 @@ The following methods are available only for ``SeriesGroupBy`` objects.
    SeriesGroupBy.hist
    SeriesGroupBy.nlargest
    SeriesGroupBy.nsmallest
-   SeriesGroupBy.nunique
    SeriesGroupBy.unique
-   SeriesGroupBy.value_counts
    SeriesGroupBy.is_monotonic_increasing
    SeriesGroupBy.is_monotonic_decreasing