[CMake] Undo some changes made for swiftdt.
[CMake] Undo some changes made for swiftdt.

CodaFi/swift,airspeedswift/swift,JGiola/swift,JGiola/swift,tkremenek/swift,CodaFi/swift,nathawes/swift,gregomni/swift,hooman/swift,nathawes/swift,JGiola/swift,glessard/swift,atrick/swift,xwu/swift,xwu/swift,parkera/swift,tkremenek/swift,airspeedswift/swift,hooman/swift,stephentyrone/swift,ahoppen/swift,rudkx/swift,parkera/swift,CodaFi/swift,stephentyrone/swift,jckarter/swift,xwu/swift,stephentyrone/swift,gregomni/swift,CodaFi/swift,parkera/swift,allevato/swift,atrick/swift,CodaFi/swift,jmgc/swift,nathawes/swift,glessard/swift,benlangmuir/swift,tkremenek/swift,apple/swift,airspeedswift/swift,gregomni/swift,hooman/swift,allevato/swift,airspeedswift/swift,jmgc/swift,stephentyrone/swift,roambotics/swift,jckarter/swift,allevato/swift,stephentyrone/swift,tkremenek/swift,ahoppen/swift,parkera/swift,nathawes/swift,gregomni/swift,parkera/swift,rudkx/swift,benlangmuir/swift,ahoppen/swift,JGiola/swift,airspeedswift/swift,glessard/swift,benlangmuir/swift,hooman/swift,roambotics/swift,apple/swift,allevato/swift,parkera/swift,CodaFi/swift,atrick/swift,airspeedswift/swift,nathawes/swift,stephentyrone/swift,xwu/swift,apple/swift,jckarter/swift,benlangmuir/swift,ahoppen/swift,atrick/swift,xwu/swift,allevato/swift,roambotics/swift,rudkx/swift,jmgc/swift,allevato/swift,jckarter/swift,CodaFi/swift,parkera/swift,glessard/swift,gregomni/swift,jmgc/swift,allevato/swift,rudkx/swift,roambotics/swift,xwu/swift,apple/swift,glessard/swift,airspeedswift/swift,jckarter/swift,glessard/swift,roambotics/swift,JGiola/swift,roambotics/swift,jmgc/swift,apple/swift,tkremenek/swift,ahoppen/swift,hooman/swift,rudkx/swift,jckarter/swift,hooman/swift,nathawes/swift,apple/swift,JGiola/swift,stephentyrone/swift,gregomni/swift,ahoppen/swift,benlangmuir/swift,benlangmuir/swift,jmgc/swift,parkera/swift,xwu/swift,jckarter/swift,atrick/swift,jmgc/swift,rudkx/swift,tkremenek/swift,hooman/swift,atrick/swift,nathawes/swift,tkremenek/swift