[JIT] Remove dead store in quantization_patterns.h (#40623)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/40623
Test Plan: Continuous integration.
Reviewed By: jerryzh168
Differential Revision: D22259209
fbshipit-source-id: 90c9e79e039100f2961195504bb81230bba5c5fe
