Remove notice about ast node types no longer available

Author: SnoopJ

Doc/library/ast.rst

@@ -139,13 +139,6 @@ Node classes
     The :meth:`~object.__repr__` output of :class:`~ast.AST` nodes includes
     the values of the node fields.
 
-.. deprecated:: 3.8
-
-   Old classes :class:`!ast.Num`, :class:`!ast.Str`, :class:`!ast.Bytes`,
-   :class:`!ast.NameConstant` and :class:`!ast.Ellipsis` are still available,
-   but they will be removed in future Python releases.  In the meantime,
-   instantiating them will return an instance of a different class.
-
 .. deprecated:: 3.9
 
    Old classes :class:`!ast.Index` and :class:`!ast.ExtSlice` are still