Delete defunct LegacyTHFunctions templates (#53016)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/53016
We just checked in the generated files directly.
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Test Plan: Imported from OSS
Reviewed By: bdhirsh
Differential Revision: D26724876
Pulled By: ezyang
fbshipit-source-id: 887d781cac47b7cf16ba2cd6079c63b8f186fe44
