Remove redundent assertion. We check the same assertion in SILValue::replaceAllUsesWith.
Remove redundent assertion. We check the same assertion in SILValue::replaceAllUsesWith.

Swift SVN r14748

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