Get rid of some unused THGenerate*Type defines. (#32657)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/32657
The goal here is to simplify the codegen enough that we can just handwrite the bindings, so anything in here is "bad".
Test Plan: Imported from OSS
Differential Revision: D19584521
Pulled By: gchanan
fbshipit-source-id: 93005b178228c52a1517e911adde2e2fe46d66a5
