SILGen: Remove dead code from Swift 3 removal
SILGen: Remove dead code from Swift 3 removal

aschwaighofer/swift,hooman/swift,atrick/swift,brentdax/swift,lorentey/swift,parkera/swift,CodaFi/swift,airspeedswift/swift,harlanhaskins/swift,practicalswift/swift,amraboelela/swift,xwu/swift,karwa/swift,parkera/swift,jckarter/swift,shajrawi/swift,gribozavr/swift,ahoppen/swift,danielmartin/swift,rudkx/swift,karwa/swift,airspeedswift/swift,devincoughlin/swift,sschiau/swift,practicalswift/swift,sschiau/swift,allevato/swift,hooman/swift,rudkx/swift,roambotics/swift,tkremenek/swift,alblue/swift,shahmishal/swift,xwu/swift,parkera/swift,apple/swift,xedin/swift,nathawes/swift,harlanhaskins/swift,nathawes/swift,allevato/swift,parkera/swift,benlangmuir/swift,hooman/swift,lorentey/swift,roambotics/swift,glessard/swift,austinzheng/swift,harlanhaskins/swift,amraboelela/swift,hooman/swift,stephentyrone/swift,harlanhaskins/swift,jckarter/swift,xedin/swift,danielmartin/swift,roambotics/swift,gregomni/swift,glessard/swift,danielmartin/swift,practicalswift/swift,atrick/swift,shahmishal/swift,sschiau/swift,nathawes/swift,CodaFi/swift,hooman/swift,aschwaighofer/swift,xedin/swift,shajrawi/swift,amraboelela/swift,gribozavr/swift,gregomni/swift,rudkx/swift,rudkx/swift,tkremenek/swift,ahoppen/swift,devincoughlin/swift,rudkx/swift,ahoppen/swift,stephentyrone/swift,xwu/swift,karwa/swift,ahoppen/swift,shahmishal/swift,benlangmuir/swift,atrick/swift,stephentyrone/swift,xwu/swift,aschwaighofer/swift,glessard/swift,austinzheng/swift,allevato/swift,austinzheng/swift,sschiau/swift,jmgc/swift,jmgc/swift,austinzheng/swift,karwa/swift,jmgc/swift,brentdax/swift,ahoppen/swift,benlangmuir/swift,devincoughlin/swift,stephentyrone/swift,practicalswift/swift,jckarter/swift,karwa/swift,shahmishal/swift,alblue/swift,amraboelela/swift,alblue/swift,atrick/swift,roambotics/swift,parkera/swift,devincoughlin/swift,roambotics/swift,amraboelela/swift,parkera/swift,jmgc/swift,practicalswift/swift,tkremenek/swift,shajrawi/swift,rudkx/swift,danielmartin/swift,gregomni/swift,shahmishal/swift,alblue/swift,JGiola/swift,allevato/swift,gribozavr/swift,JGiola/swift,xedin/swift,sschiau/swift,harlanhaskins/swift,jckarter/swift,practicalswift/swift,shajrawi/swift,CodaFi/swift,brentdax/swift,karwa/swift,airspeedswift/swift,CodaFi/swift,danielmartin/swift,lorentey/swift,glessard/swift,JGiola/swift,amraboelela/swift,tkremenek/swift,jmgc/swift,nathawes/swift,amraboelela/swift,shahmishal/swift,shajrawi/swift,airspeedswift/swift,nathawes/swift,gribozavr/swift,xwu/swift,parkera/swift,stephentyrone/swift,austinzheng/swift,xedin/swift,tkremenek/swift,apple/swift,apple/swift,JGiola/swift,apple/swift,apple/swift,roambotics/swift,aschwaighofer/swift,shahmishal/swift,jckarter/swift,brentdax/swift,hooman/swift,alblue/swift,brentdax/swift,austinzheng/swift,airspeedswift/swift,alblue/swift,glessard/swift,xwu/swift,aschwaighofer/swift,glessard/swift,allevato/swift,devincoughlin/swift,gribozavr/swift,CodaFi/swift,gregomni/swift,lorentey/swift,harlanhaskins/swift,apple/swift,jckarter/swift,jckarter/swift,sschiau/swift,benlangmuir/swift,karwa/swift,xedin/swift,atrick/swift,practicalswift/swift,devincoughlin/swift,sschiau/swift,xedin/swift,benlangmuir/swift,shajrawi/swift,aschwaighofer/swift,stephentyrone/swift,airspeedswift/swift,xwu/swift,aschwaighofer/swift,tkremenek/swift,allevato/swift,gregomni/swift,shajrawi/swift,JGiola/swift,gribozavr/swift,airspeedswift/swift,danielmartin/swift,hooman/swift,lorentey/swift,tkremenek/swift,sschiau/swift,lorentey/swift,brentdax/swift,nathawes/swift,CodaFi/swift,benlangmuir/swift,harlanhaskins/swift,danielmartin/swift,JGiola/swift,devincoughlin/swift,jmgc/swift,xedin/swift,lorentey/swift,practicalswift/swift,ahoppen/swift,stephentyrone/swift,parkera/swift,brentdax/swift,jmgc/swift,allevato/swift,shahmishal/swift,karwa/swift,lorentey/swift,austinzheng/swift,shajrawi/swift,atrick/swift,devincoughlin/swift,CodaFi/swift,nathawes/swift,gribozavr/swift,alblue/swift,gregomni/swift,gribozavr/swift