stdlib: remove an unused-function
stdlib: remove an unused-function

This function is only used in the ObjC interop case.  Control it via the
preprocesor.

ken0nek/swift,zisko/swift,rudkx/swift,arvedviehweger/swift,karwa/swift,natecook1000/swift,kperryua/swift,tardieu/swift,therealbnut/swift,tkremenek/swift,jckarter/swift,sschiau/swift,airspeedswift/swift,jckarter/swift,lorentey/swift,jopamer/swift,ken0nek/swift,codestergit/swift,jckarter/swift,gregomni/swift,JaSpa/swift,russbishop/swift,shajrawi/swift,devincoughlin/swift,harlanhaskins/swift,tkremenek/swift,uasys/swift,JaSpa/swift,shajrawi/swift,deyton/swift,stephentyrone/swift,devincoughlin/swift,CodaFi/swift,JGiola/swift,IngmarStein/swift,gmilos/swift,practicalswift/swift,harlanhaskins/swift,natecook1000/swift,russbishop/swift,gribozavr/swift,manavgabhawala/swift,nathawes/swift,allevato/swift,hughbe/swift,devincoughlin/swift,tinysun212/swift-windows,arvedviehweger/swift,gmilos/swift,natecook1000/swift,gregomni/swift,aschwaighofer/swift,gregomni/swift,zisko/swift,alblue/swift,gottesmm/swift,parkera/swift,airspeedswift/swift,shahmishal/swift,brentdax/swift,djwbrown/swift,deyton/swift,stephentyrone/swift,jopamer/swift,codestergit/swift,shahmishal/swift,parkera/swift,jtbandes/swift,aschwaighofer/swift,karwa/swift,amraboelela/swift,ben-ng/swift,karwa/swift,jckarter/swift,lorentey/swift,OscarSwanros/swift,xedin/swift,jopamer/swift,alblue/swift,dreamsxin/swift,zisko/swift,aschwaighofer/swift,tjw/swift,amraboelela/swift,felix91gr/swift,huonw/swift,jckarter/swift,modocache/swift,apple/swift,karwa/swift,allevato/swift,tkremenek/swift,harlanhaskins/swift,aschwaighofer/swift,uasys/swift,ahoppen/swift,djwbrown/swift,austinzheng/swift,bitjammer/swift,CodaFi/swift,natecook1000/swift,felix91gr/swift,kperryua/swift,arvedviehweger/swift,tinysun212/swift-windows,IngmarStein/swift,alblue/swift,stephentyrone/swift,kperryua/swift,hooman/swift,hooman/swift,allevato/swift,parkera/swift,frootloops/swift,frootloops/swift,xedin/swift,stephentyrone/swift,codestergit/swift,xwu/swift,roambotics/swift,practicalswift/swift,atrick/swift,gribozavr/swift,xedin/swift,parkera/swift,amraboelela/swift,tardieu/swift,sschiau/swift,modocache/swift,felix91gr/swift,calebd/swift,return/swift,shahmishal/swift,tardieu/swift,return/swift,ben-ng/swift,lorentey/swift,Jnosh/swift,jmgc/swift,lorentey/swift,hooman/swift,shajrawi/swift,gmilos/swift,arvedviehweger/swift,nathawes/swift,stephentyrone/swift,gregomni/swift,airspeedswift/swift,gottesmm/swift,calebd/swift,benlangmuir/swift,CodaFi/swift,stephentyrone/swift,Jnosh/swift,ahoppen/swift,frootloops/swift,natecook1000/swift,shajrawi/swift,jtbandes/swift,gottesmm/swift,deyton/swift,sschiau/swift,aschwaighofer/swift,shahmishal/swift,nathawes/swift,brentdax/swift,stephentyrone/swift,jopamer/swift,austinzheng/swift,gmilos/swift,manavgabhawala/swift,xwu/swift,alblue/swift,karwa/swift,uasys/swift,parkera/swift,alblue/swift,russbishop/swift,therealbnut/swift,russbishop/swift,atrick/swift,hughbe/swift,frootloops/swift,swiftix/swift,tjw/swift,hughbe/swift,airspeedswift/swift,xwu/swift,danielmartin/swift,modocache/swift,djwbrown/swift,tjw/swift,benlangmuir/swift,apple/swift,tkremenek/swift,zisko/swift,hooman/swift,milseman/swift,jckarter/swift,tardieu/swift,devincoughlin/swift,karwa/swift,huonw/swift,xwu/swift,gottesmm/swift,gribozavr/swift,OscarSwanros/swift,ahoppen/swift,sschiau/swift,allevato/swift,gribozavr/swift,deyton/swift,return/swift,nathawes/swift,danielmartin/swift,felix91gr/swift,hooman/swift,deyton/swift,milseman/swift,tjw/swift,jmgc/swift,tinysun212/swift-windows,jmgc/swift,JaSpa/swift,bitjammer/swift,Jnosh/swift,ken0nek/swift,shajrawi/swift,harlanhaskins/swift,bitjammer/swift,rudkx/swift,swiftix/swift,ben-ng/swift,modocache/swift,frootloops/swift,OscarSwanros/swift,modocache/swift,harlanhaskins/swift,karwa/swift,gregomni/swift,austinzheng/swift,roambotics/swift,hughbe/swift,xedin/swift,danielmartin/swift,glessard/swift,practicalswift/swift,swiftix/swift,shahmishal/swift,tardieu/swift,OscarSwanros/swift,kstaring/swift,gottesmm/swift,shahmishal/swift,brentdax/swift,djwbrown/swift,glessard/swift,jopamer/swift,deyton/swift,amraboelela/swift,danielmartin/swift,CodaFi/swift,zisko/swift,zisko/swift,harlanhaskins/swift,jmgc/swift,apple/swift,huonw/swift,tinysun212/swift-windows,harlanhaskins/swift,jmgc/swift,therealbnut/swift,austinzheng/swift,milseman/swift,JGiola/swift,modocache/swift,swiftix/swift,shajrawi/swift,kstaring/swift,return/swift,rudkx/swift,ahoppen/swift,xedin/swift,rudkx/swift,zisko/swift,return/swift,frootloops/swift,benlangmuir/swift,deyton/swift,allevato/swift,hughbe/swift,roambotics/swift,amraboelela/swift,bitjammer/swift,roambotics/swift,shajrawi/swift,therealbnut/swift,atrick/swift,austinzheng/swift,felix91gr/swift,IngmarStein/swift,practicalswift/swift,shajrawi/swift,tkremenek/swift,glessard/swift,benlangmuir/swift,apple/swift,tjw/swift,CodaFi/swift,danielmartin/swift,sschiau/swift,milseman/swift,CodaFi/swift,tinysun212/swift-windows,nathawes/swift,russbishop/swift,parkera/swift,kperryua/swift,ahoppen/swift,codestergit/swift,ben-ng/swift,lorentey/swift,kperryua/swift,jtbandes/swift,jmgc/swi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