CTCLoss: Remove dispatching in parallel region (#60599)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/60599
Ref #56794
Test Plan: Imported from OSS
Reviewed By: jbschlosser
Differential Revision: D29446190
Pulled By: ngimel
fbshipit-source-id: eb01783c8c32a1405b58e1364fc3d71c0f054e0a
