Remove EXPERIMENTAL_ENUM_SUPPORT feature guard (#44243)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/41095
Pull Request resolved: https://github.com/pytorch/pytorch/pull/44243
Reviewed By: ZolotukhinM
Differential Revision: D23605979
Pulled By: gmagogsfm
fbshipit-source-id: 098ae69049c4664ad5d1521c45b8a7dd22e72f6c
