[moveOnly] Simplify some code as per DougG's review in a589b4a12832f248569975bb7266acb69bd65f82.
[moveOnly] Simplify some code as per DougG's review in a589b4a12832f248569975bb7266acb69bd65f82.

This is tested by test/Sema/noimplicitcopy_attr.swift. Everything still passes!

JGiola/swift,glessard/swift,JGiola/swift,ahoppen/swift,gregomni/swift,atrick/swift,atrick/swift,gregomni/swift,roambotics/swift,ahoppen/swift,atrick/swift,roambotics/swift,rudkx/swift,apple/swift,gregomni/swift,ahoppen/swift,apple/swift,atrick/swift,atrick/swift,JGiola/swift,roambotics/swift,rudkx/swift,JGiola/swift,glessard/swift,apple/swift,gregomni/swift,ahoppen/swift,roambotics/swift,glessard/swift,rudkx/swift,rudkx/swift,JGiola/swift,roambotics/swift,apple/swift,atrick/swift,glessard/swift,roambotics/swift,rudkx/swift,ahoppen/swift,ahoppen/swift,gregomni/swift,benlangmuir/swift,benlangmuir/swift,benlangmuir/swift,glessard/swift,benlangmuir/swift,rudkx/swift,apple/swift,gregomni/swift,apple/swift,benlangmuir/swift,JGiola/swift,glessard/swift,benlangmuir/swift