Remove ImportHintKind::Reference
Remove ImportHintKind::Reference

The only place in the Clang Importer that needs to deal with anything
related to C++, and it doesn't actually do anything.  Remove the
import hint and the last place where the importer creates InOutTypes
as well.

benlangmuir/swift,hooman/swift,djwbrown/swift,xwu/swift,jopamer/swift,devincoughlin/swift,stephentyrone/swift,deyton/swift,tjw/swift,amraboelela/swift,brentdax/swift,alblue/swift,benlangmuir/swift,alblue/swift,uasys/swift,lorentey/swift,rudkx/swift,natecook1000/swift,felix91gr/swift,devincoughlin/swift,swiftix/swift,gribozavr/swift,practicalswift/swift,lorentey/swift,alblue/swift,gribozavr/swift,apple/swift,karwa/swift,JGiola/swift,shajrawi/swift,xedin/swift,milseman/swift,felix91gr/swift,xwu/swift,huonw/swift,xwu/swift,tjw/swift,sschiau/swift,benlangmuir/swift,shajrawi/swift,parkera/swift,brentdax/swift,swiftix/swift,natecook1000/swift,shahmishal/swift,hooman/swift,stephentyrone/swift,frootloops/swift,milseman/swift,gregomni/swift,airspeedswift/swift,jckarter/swift,return/swift,shahmishal/swift,amraboelela/swift,aschwaighofer/swift,xwu/swift,natecook1000/swift,zisko/swift,gribozavr/swift,swiftix/swift,shahmishal/swift,tjw/swift,danielmartin/swift,danielmartin/swift,parkera/swift,tjw/swift,ahoppen/swift,hooman/swift,xwu/swift,shajrawi/swift,milseman/swift,nathawes/swift,gregomni/swift,xedin/swift,jmgc/swift,brentdax/swift,ahoppen/swift,xedin/swift,brentdax/swift,amraboelela/swift,hooman/swift,harlanhaskins/swift,sschiau/swift,roambotics/swift,rudkx/swift,glessard/swift,JGiola/swift,zisko/swift,jopamer/swift,allevato/swift,xedin/swift,stephentyrone/swift,jckarter/swift,return/swift,shajrawi/swift,gribozavr/swift,nathawes/swift,OscarSwanros/swift,jopamer/swift,xwu/swift,practicalswift/swift,airspeedswift/swift,roambotics/swift,devincoughlin/swift,amraboelela/swift,tkremenek/swift,hooman/swift,airspeedswift/swift,brentdax/swift,rudkx/swift,OscarSwanros/swift,return/swift,austinzheng/swift,devincoughlin/swift,alblue/swift,uasys/swift,karwa/swift,rudkx/swift,parkera/swift,parkera/swift,swiftix/swift,frootloops/swift,milseman/swift,apple/swift,alblue/swift,amraboelela/swift,frootloops/swift,deyton/swift,tkremenek/swift,rudkx/swift,karwa/swift,felix91gr/swift,gregomni/swift,aschwaighofer/swift,rudkx/swift,OscarSwanros/swift,hooman/swift,atrick/swift,apple/swift,danielmartin/swift,uasys/swift,tkremenek/swift,deyton/swift,jckarter/swift,djwbrown/swift,jmgc/swift,shajrawi/swift,nathawes/swift,tkremenek/swift,shahmishal/swift,danielmartin/swift,practicalswift/swift,felix91gr/swift,shahmishal/swift,devincoughlin/swift,lorentey/swift,CodaFi/swift,huonw/swift,practicalswift/swift,tkremenek/swift,return/swift,ahoppen/swift,austinzheng/swift,sschiau/swift,milseman/swift,atrick/swift,practicalswift/swift,gregomni/swift,austinzheng/swift,gregomni/swift,zisko/swift,natecook1000/swift,jmgc/swift,sschiau/swift,brentdax/swift,OscarSwanros/swift,lorentey/swift,devincoughlin/swift,deyton/swift,deyton/swift,OscarSwanros/swift,austinzheng/swift,jckarter/swift,airspeedswift/swift,xwu/swift,swiftix/swift,nathawes/swift,frootloops/swift,xedin/swift,gribozavr/swift,CodaFi/swift,ahoppen/swift,felix91gr/swift,OscarSwanros/swift,harlanhaskins/swift,glessard/swift,JGiola/swift,benlangmuir/swift,shahmishal/swift,jopamer/swift,harlanhaskins/swift,danielmartin/swift,JGiola/swift,apple/swift,shahmishal/swift,xedin/swift,devincoughlin/swift,jopamer/swift,glessard/swift,jmgc/swift,djwbrown/swift,djwbrown/swift,felix91gr/swift,frootloops/swift,atrick/swift,CodaFi/swift,zisko/swift,stephentyrone/swift,allevato/swift,parkera/swift,karwa/swift,allevato/swift,xedin/swift,natecook1000/swift,apple/swift,apple/swift,natecook1000/swift,parkera/swift,roambotics/swift,harlanhaskins/swift,airspeedswift/swift,return/swift,glessard/swift,aschwaighofer/swift,huonw/swift,djwbrown/swift,felix91gr/swift,roambotics/swift,parkera/swift,harlanhaskins/swift,return/swift,zisko/swift,practicalswift/swift,lorentey/swift,jckarter/swift,frootloops/swift,zisko/swift,danielmartin/swift,sschiau/swift,amraboelela/swift,ahoppen/swift,alblue/swift,lorentey/swift,nathawes/swift,tkremenek/swift,huonw/swift,danielmartin/swift,swiftix/swift,gribozavr/swift,frootloops/swift,benlangmuir/swift,karwa/swift,ahoppen/swift,uasys/swift,CodaFi/swift,JGiola/swift,aschwaighofer/swift,allevato/swift,allevato/swift,atrick/swift,atrick/swift,austinzheng/swift,huonw/swift,glessard/swift,brentdax/swift,huonw/swift,shajrawi/swift,JGiola/swift,atrick/swift,uasys/swift,jckarter/swift,alblue/swift,austinzheng/swift,tjw/swift,gribozavr/swift,shahmishal/swift,harlanhaskins/swift,roambotics/swift,aschwaighofer/swift,airspeedswift/swift,sschiau/swift,stephentyrone/swift,jmgc/swift,stephentyrone/swift,CodaFi/swift,aschwaighofer/swift,jmgc/swift,tkremenek/swift,CodaFi/swift,nathawes/swift,deyton/swift,OscarSwanros/swift,hooman/swift,huonw/swift,shajrawi/swift,roambotics/swift,shajrawi/swift,allevato/swift,parkera/swift,tjw/swift,swiftix/swift,jckarter/swift,deyton/swift,sschiau/swift,amraboelela/swift,karwa/swift,return/swift,jmgc/swift,lorentey/swift,djwbrown/swift,stephentyrone/swift,natecook1000/swift,xedin/swift,gregomni/swift,milseman/swift,lorentey/swift,gribozavr/swift,karwa/swift,devincoughlin/swift,airspeedswift/swift,glessard/swift,practicalswift/swift,milseman/swift,djwbrown/swift,uasys/swift,tjw/swift,uasys/swift,jopamer/swift,jopamer/swift,austinzheng/swift,benlangmuir/swift,zisko/swift,harlanhaskins/swift,practicalswift/swift,karwa/swift,allevato/swift,CodaFi/swift,nathawes/swift,sschiau/swift,aschwaighofer/swift