Remove superfluous virtual keyword as pointed out by Joe's review.
Remove superfluous virtual keyword as pointed out by Joe's review.

Swift SVN r5784

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