Revert D33919683: [FSDP] Implement local_state_dict and load_local_state_dict
Test Plan: revert-hammer
Differential Revision:
D33919683 (https://github.com/pytorch/pytorch/commit/d50643adcd8ca144c9b2d5de339b95be5339bf63)
Original commit changeset: c9f1b43ce04d
Original Phabricator Diff: D33919683 (https://github.com/pytorch/pytorch/commit/d50643adcd8ca144c9b2d5de339b95be5339bf63)
fbshipit-source-id: c54c181edf8eb6a3bc509ed54d34ffdce11b93f5
(cherry picked from commit 4dfb50cd0d86abfb17fcfbecd1f42a2dc633afb9)
