Delete some dead functions from tools.codegen.api.meta (#49041)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/49041
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Test Plan: Imported from OSS
Reviewed By: H-Huang
Differential Revision: D25455886
Pulled By: ezyang
fbshipit-source-id: 5d7834d52f7032820ac2c73358bda77187c17224
