[JIT] Remove dead store in quantization_patterns.h (#40724)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/40724
Test Plan: Continuous integration.
Differential Revision: D22294600
Pulled By: SplitInfinity
fbshipit-source-id: 04546579273d8864d91c3c74a654aa75ba34ee45
