Revert D28836788: add BFloat16 support for UpSample on CPU
Test Plan: revert-hammer
Differential Revision:
D28836788 (https://github.com/pytorch/pytorch/commit/1399d83bc09d9396afc169e6c134fa3bddd6faa5)
Original commit changeset: 63dc45e5bb91
Original Phabricator Diff: D28836788 (https://github.com/pytorch/pytorch/commit/1399d83bc09d9396afc169e6c134fa3bddd6faa5)
fbshipit-source-id: 92733af87cba87aed800473ff44ca6d7af037da9
(cherry picked from commit 1c9fc492503b768a343723e4cf347b30bf5dcfc2)
