[nnc] Removed setGPUBlockIndex and setGPUThreadIndex methods from LoopNest (#59495)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/59495
Test Plan: Imported from OSS
Reviewed By: ZolotukhinM
Differential Revision: D28915960
Pulled By: navahgar
fbshipit-source-id: 20a4032b031aba6e43d85433ade5f0680c65fbc0
