bpo-34282: Remove deprecated enum _convert method (GH-13823)

Lib/enum.py

@@ -464,12 +464,6 @@ class EnumMeta(type):
         module_globals[name] = cls
         return cls
 
-    def _convert(cls, *args, **kwargs):
-        import warnings
-        warnings.warn("_convert is deprecated and will be removed in 3.9, use "
-                      "_convert_ instead.", DeprecationWarning, stacklevel=2)
-        return cls._convert_(*args, **kwargs)
-
     @staticmethod
     def _get_mixins_(bases):
         """Returns the type for creating enum members, and the first inherited

Misc/NEWS.d/next/Library/2019-06-04-15-39-14.bpo-34282.aAK54n.rst

+Remove ``Enum._convert`` method, deprecated in 3.8.