fmin has been ported to the structured kernel, removing the old implementation (#60810)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/60810
Test Plan: Imported from OSS
Reviewed By: mruberry
Differential Revision: D29449377
Pulled By: ezyang
fbshipit-source-id: 0b43562d0dfe81dfa401268f1d12e0d2c3c9f420
