Remove assert that can never fire.
Remove assert that can never fire.

We would assert in the preceeding cast<> if it were to fail.

Swift SVN r25915

gmilos/swift,xedin/swift,devincoughlin/swift,JGiola/swift,kstaring/swift,glessard/swift,bitjammer/swift,therealbnut/swift,ben-ng/swift,jopamer/swift,CodaFi/swift,practicalswift/swift,kstaring/swift,arvedviehweger/swift,jopamer/swift,gmilos/swift,bitjammer/swift,sschiau/swift,danielmartin/swift,dduan/swift,uasys/swift,russbishop/swift,deyton/swift,karwa/swift,codestergit/swift,uasys/swift,natecook1000/swift,dduan/swift,russbishop/swift,adrfer/swift,jopamer/swift,MukeshKumarS/Swift,tinysun212/swift-windows,JGiola/swift,OscarSwanros/swift,jtbandes/swift,JaSpa/swift,amraboelela/swift,IngmarStein/swift,rudkx/swift,nathawes/swift,huonw/swift,kentya6/swift,cbrentharris/swift,tardieu/swift,emilstahl/swift,arvedviehweger/swift,zisko/swift,felix91gr/swift,johnno1962d/swift,danielmartin/swift,tkremenek/swift,Jnosh/swift,arvedviehweger/swift,jckarter/swift,huonw/swift,milseman/swift,swiftix/swift.old,johnno1962d/swift,emilstahl/swift,khizkhiz/swift,dduan/swift,amraboelela/swift,rudkx/swift,karwa/swift,practicalswift/swift,benlangmuir/swift,tardieu/swift,codestergit/swift,jckarter/swift,amraboelela/swift,Ivacker/swift,sdulal/swift,airspeedswift/swift,parkera/swift,apple/swift,nathawes/swift,sschiau/swift,khizkhiz/swift,huonw/swift,swiftix/swift.old,airspeedswift/swift,roambotics/swift,SwiftAndroid/swift,khizkhiz/swift,CodaFi/swift,JaSpa/swift,kusl/swift,karwa/swift,huonw/swift,rudkx/swift,kentya6/swift,stephentyrone/swift,LeoShimonaka/swift,shahmishal/swift,tjw/swift,JGiola/swift,tjw/swift,frootloops/swift,shahmishal/swift,shahmishal/swift,djwbrown/swift,sschiau/swift,dduan/swift,mightydeveloper/swift,hooman/swift,CodaFi/swift,calebd/swift,kentya6/swift,kperryua/swift,CodaFi/swift,deyton/swift,kusl/swift,zisko/swift,codestergit/swift,shahmishal/swift,cbrentharris/swift,glessard/swift,benlangmuir/swift,djwbrown/swift,jopamer/swift,practicalswift/swift,uasys/swift,calebd/swift,tardieu/swift,adrfer/swift,tkremenek/swift,roambotics/swift,parkera/swift,adrfer/swift,brentdax/swift,xedin/swift,shahmishal/swift,tardieu/swift,practicalswift/swift,jopamer/swift,allevato/swift,cbrentharris/swift,felix91gr/swift,austinzheng/swift,ken0nek/swift,hooman/swift,jmgc/swift,shajrawi/swift,return/swift,therealbnut/swift,OscarSwanros/swift,therealbnut/swift,gmilos/swift,brentdax/swift,hooman/swift,allevato/swift,deyton/swift,tjw/swift,danielmartin/swift,apple/swift,mightydeveloper/swift,kstaring/swift,jmgc/swift,parkera/swift,allevato/swift,stephentyrone/swift,modocache/swift,hughbe/swift,bitjammer/swift,roambotics/swift,gribozavr/swift,gregomni/swift,mightydeveloper/swift,brentdax/swift,calebd/swift,ken0nek/swift,slavapestov/swift,ben-ng/swift,gribozavr/swift,rudkx/swift,gottesmm/swift,kusl/swift,benlangmuir/swift,MukeshKumarS/Swift,cbrentharris/swift,amraboelela/swift,jtbandes/swift,slavapestov/swift,zisko/swift,apple/swift,tinysun212/swift-windows,modocache/swift,swiftix/swift.old,lorentey/swift,shajrawi/swift,atrick/swift,manavgabhawala/swift,djwbrown/swift,emilstahl/swift,jckarter/swift,Ivacker/swift,jmgc/swift,danielmartin/swift,huonw/swift,swiftix/swift.old,LeoShimonaka/swift,felix91gr/swift,xedin/swift,kusl/swift,sdulal/swift,IngmarStein/swift,bitjammer/swift,manavgabhawala/swift,frootloops/swift,airspeedswift/swift,slavapestov/swift,alblue/swift,natecook1000/swift,gribozavr/swift,jckarter/swift,Jnosh/swift,KrishMunot/swift,gribozavr/swift,milseman/swift,uasys/swift,glessard/swift,Jnosh/swift,therealbnut/swift,cbrentharris/swift,JaSpa/swift,djwbrown/swift,MukeshKumarS/Swift,deyton/swift,karwa/swift,devincoughlin/swift,shajrawi/swift,gottesmm/swift,ken0nek/swift,tinysun212/swift-windows,ahoppen/swift,MukeshKumarS/Swift,russbishop/swift,OscarSwanros/swift,harlanhaskins/swift,KrishMunot/swift,shahmishal/swift,xedin/swift,SwiftAndroid/swift,slavapestov/swift,dreamsxin/swift,KrishMunot/swift,austinzheng/swift,gregomni/swift,slavapestov/swift,xedin/swift,LeoShimonaka/swift,calebd/swift,milseman/swift,Jnosh/swift,tkremenek/swift,lorentey/swift,nathawes/swift,practicalswift/swift,sdulal/swift,aschwaighofer/swift,swiftix/swift,emilstahl/swift,kperryua/swift,djwbrown/swift,johnno1962d/swift,aschwaighofer/swift,kstaring/swift,karwa/swift,swiftix/swift,Ivacker/swift,karwa/swift,jtbandes/swift,manavgabhawala/swift,uasys/swift,return/swift,mightydeveloper/swift,xwu/swift,practicalswift/swift,alblue/swift,bitjammer/swift,zisko/swift,kentya6/swift,karwa/swift,jmgc/swift,milseman/swift,ken0nek/swift,swiftix/swift.old,KrishMunot/swift,xwu/swift,swiftix/swift,tjw/swift,gmilos/swift,allevato/swift,atrick/swift,return/swift,aschwaighofer/swift,khizkhiz/swift,jtbandes/swift,ben-ng/swift,kstaring/swift,kentya6/swift,airspeedswift/swift,jopamer/swift,kentya6/swift,LeoShimonaka/swift,swiftix/swift,nathawes/swift,glessard/swift,return/swift,gribozavr/swift,calebd/swift,deyton/swift,JGiola/swift,aschwaighofer/swift,codestergit/swift,benlangmuir/swift,ahoppen/swift,gribozavr/swift,gmilos/swift,Ivacker/swift,parkera/swift,devincoughlin/swift,Ivacker/swift,airspeedswift/swift,therealbnut/swift,SwiftAndroid/swift,rudkx/swift,harlanhaskins/swift,MukeshKumarS/Swift,shahmishal/swift,sschiau/swift,gregomni/swift,ahoppen/swift,ahoppen/swift,hughbe/swift,alblue/swift,amraboelela/swift,apple/swift,felix91gr/swift,KrishMunot/swift,jmgc/swift,IngmarStein/swift,xwu/swift,lorentey/swift,sschiau/swift,sdulal/swift,kstaring/swift,manavgabhawala/swift,uasys/swift,hooman/swift,allevato/swift,xwu/swift,amraboelela/swift,cbrentharris/swift,adrfer/swift,austinzheng/swift,devincoughlin/swift,Jnosh/swift,russbishop/swift,kperryua/swift,russbishop/swift,gottesmm/swift,bitjammer/swift,kperryua/swift,milseman/swift,alblue/swift,deyton/swift,khizkhiz/swift,devincoughlin/swift,practicalswift/swift,stephentyrone/swift,danielmartin/swift,hooman/swift,harlanhaskins/swift,huonw/swift,cbrentharris/swift,tardieu/swift,xedin/swift,LeoShimonaka/swift,ken0nek/swift,codestergit/swift,rudkx/swift,karwa/swift,khizkhiz/swift,tardieu/swift,alblue/swift,natecook1000/swift,ben-ng/swift,frootloops/swift,calebd/swift,xwu/swift,return/swift,lorentey/swift,gottesmm/swift,brentdax/swift,calebd/swift,Jnosh/swift,cbrentharris/swift,austinzheng/swift,LeoShimonaka/swift,MukeshKumarS/Swift,kusl/swift,swiftix/swift,adrfer/swift,roambotics/swift,swiftix/swift,harlanhaskins/swift,dduan/swift,kperryua/swift,kperryua/swift,aschwaighofer/swift,tkremenek/swift,zisko/swift,zisko/swift,shajrawi/swift,gregomni/swift,ben-ng/swift,ben-ng/swift,arvedviehweger/swift,allevato/swift,parkera/swift,parkera/swift,therealbnut/swift,lorentey/swift,stephentyrone/swift,bitjammer/swift,Jnosh/swift,devincoughlin/swift,slavapestov/swift,russbishop/swift,frootloops/swift,tardieu/swift,roambotics/swift,xedin/swift,allevato/swift,aschwaighofer/swift,harlanhaskins/swift,mightydeveloper/swift,CodaFi/swift,sschiau/swift,hooman/swift,LeoShimonaka/swift,frootloops/swift,austinzheng/swift,kusl/swift,brentdax/swift,harlanhaskins/swift,practicalswift/swift,OscarSwanros/swift,benlangmuir/swift,shajrawi/swift,tinysun212/swift-windows,mightydeveloper/swift,atrick/swift,manavgabhawala/swift,dduan/swift,SwiftAndroid/swift,felix91gr/swift,kentya6/swift,slavapestov/swift,ben-ng/swift,parkera/swift,mightydeveloper/swift,danielmartin/swift,arvedviehweger/swift,JGiola/swift,CodaFi/swift,huonw/swift,swiftix/swift.old,codestergit/swift,natecook1000/swift,kusl/swift,therealbnut/swift,sdulal/swift,JaSpa/swift,kentya6/swift,khizkhiz/swift,zisko/swift,parkera/swift,gribozavr/swift,LeoShimonaka/swift,stephentyrone/swift,adrfer/swift,ahoppen/swift,CodaFi/swift,hooman/swift,return/swift,tjw/swift,jmgc/swift,johnno1962d/swift,gregomni/swift,JaSpa/swift,frootloops/swift,sdulal/swift,SwiftAndroid/swift,SwiftAndroid/swift,JaSpa/swift,djwbrown/swift,milseman/swift,codestergit/swift,SwiftAndroid/swift,austinzheng/swift,harlanhaskins/swift,johnno1962d/swift,OscarSwanros/swift,emilstahl/swift,Ivacker/swift,gmilos/swift,johnno1962d/swift,modocache/swift,danielmartin/swift,KrishMunot/swift,hughbe/swift,lorentey/swift,IngmarStein/swift,airspeedswift/swift,gmilos/swift,russbishop/swift,modocache/swift,manavgabhawala/swift,manavgabhawala/swift,gribozavr/swift,alblue/swift,tjw/swift,aschwaighofer/swift,jtbandes/swift,atrick/swift,Ivacker/swift,lorentey/swift,swiftix/swift.old,gottesmm/swift,return/swift,tjw/swift,shajrawi/swift,xwu/swift,frootloops/swift,emilstahl/swift,kstaring/swift,gottesmm/swift,tinysun212/swift-windows,dreamsxin/swift,modocache/swift,ken0nek/swift,IngmarStein/swift,lorentey/swift,swiftix/swift.old,johnno1962d/swift,modocache/swift,shajrawi/swift,austinzheng/swift,emilstahl/swift,sschiau/swift,shahmishal/swift,deyton/swift,tinysun212/swift-windows,MukeshKumarS/Swift,djwbrown/swift,tinysun212/swift-windows,Ivacker/swift,sdulal/swift,JGiola/swift,felix91gr/swift,brentdax/swift,hughbe/swift,felix91gr/swift,arvedviehweger/swift,benlangmuir/swift,apple/swift,jmgc/swift,airspeedswift/swift,IngmarStein/swift,ken0nek/swift,xedin/swift,sdulal/swift,jckarter/swift,jckarter/swift,OscarSwanros/swift,atrick/swift,kusl/swift,kperryua/swift,xwu/swift,emilstahl/swift,stephentyrone/swift,natecook1000/swift,natecook1000/swift,natecook1000/swift,stephentyrone/swift,OscarSwanros/swift,arvedviehweger/swift,modocache/swift,nathawes/swift,shajrawi/swift,hughbe/swift,sschiau/swift,gottesmm/swift,gregomni/swift,glessard/swift,alblue/swift,jopamer/swift,tkremenek/swift,uasys/swift,jtbandes/swift,roambotics/swift,tkremenek/swift,mightydeveloper/swift,amraboelela/swift,ahoppen/swift,jtbandes/swift,tkremenek/swift,apple/swift,brentdax/swift,JaSpa/swift,nathawes/swift,devincoughlin/swift,atrick/swift,hughbe/swift,glessard/swift,nathawes/swift,adrfer/swift,KrishMunot/swift,dduan/swift,IngmarStein/swift,jckarter/swift,devincoughlin/swift,swiftix/swift,milseman/swift,hughbe/swift