Align AT_FORALL macros with DISPATCH macros wrt Half. (#25268)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/25268
The AT_FORALL AND macros with mistakenly already include Half, which differs from the Dispatch macros.
This change shouldn't have any effect.
Test Plan: Imported from OSS
Differential Revision: D17079747
Pulled By: gchanan
fbshipit-source-id: 635eb167722ce850d6c1949fac652de4dddf32ee
