[ReconstructType] Remove an unnecessary typedef NFC
[ReconstructType] Remove an unnecessary typedef NFC

Eventually all three of these should go away.  I want to keep
ConstString around for now, because it makes it easier to audit where
you should consider using a StringRef. I'm hoping only a few of those
actually need std::string.

khizkhiz/swift,khizkhiz/swift,khizkhiz/swift,khizkhiz/swift,khizkhiz/swift,khizkhiz/swift,khizkhiz/swift