Revert r3107, the on-line tracking of type variable bounds.
Revert r3107, the on-line tracking of type variable bounds.

I'm not convinced that this is the path we want to take. Either we
should be okay with computing this as-needed (like we do now), or we
need a much bigger change to truly track the relationship between type
variables and the constraints they involve.


Swift SVN r3110

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