Remove unused swift::FilterIterator and swift::FilterRange
Remove unused swift::FilterIterator and swift::FilterRange

No functionality change ("unused")

glessard/swift,parkera/swift,devincoughlin/swift,rudkx/swift,stephentyrone/swift,gregomni/swift,airspeedswift/swift,xwu/swift,tkremenek/swift,devincoughlin/swift,hooman/swift,xwu/swift,airspeedswift/swift,allevato/swift,jmgc/swift,hooman/swift,tkremenek/swift,harlanhaskins/swift,jckarter/swift,gribozavr/swift,gregomni/swift,lorentey/swift,devincoughlin/swift,gribozavr/swift,stephentyrone/swift,allevato/swift,glessard/swift,JGiola/swift,jmgc/swift,benlangmuir/swift,roambotics/swift,rudkx/swift,jmgc/swift,gribozavr/swift,jckarter/swift,lorentey/swift,devincoughlin/swift,ahoppen/swift,lorentey/swift,allevato/swift,allevato/swift,atrick/swift,parkera/swift,JGiola/swift,glessard/swift,harlanhaskins/swift,allevato/swift,glessard/swift,nathawes/swift,apple/swift,rudkx/swift,sschiau/swift,glessard/swift,nathawes/swift,ahoppen/swift,jmgc/swift,karwa/swift,stephentyrone/swift,harlanhaskins/swift,nathawes/swift,roambotics/swift,allevato/swift,atrick/swift,gribozavr/swift,jckarter/swift,devincoughlin/swift,CodaFi/swift,ahoppen/swift,hooman/swift,sschiau/swift,benlangmuir/swift,hooman/swift,roambotics/swift,karwa/swift,lorentey/swift,roambotics/swift,airspeedswift/swift,tkremenek/swift,aschwaighofer/swift,CodaFi/swift,atrick/swift,airspeedswift/swift,gribozavr/swift,rudkx/swift,JGiola/swift,parkera/swift,CodaFi/swift,jmgc/swift,atrick/swift,airspeedswift/swift,sschiau/swift,lorentey/swift,gregomni/swift,ahoppen/swift,nathawes/swift,aschwaighofer/swift,karwa/swift,benlangmuir/swift,parkera/swift,benlangmuir/swift,roambotics/swift,CodaFi/swift,JGiola/swift,CodaFi/swift,jmgc/swift,jckarter/swift,xwu/swift,aschwaighofer/swift,stephentyrone/swift,allevato/swift,gregomni/swift,tkremenek/swift,aschwaighofer/swift,lorentey/swift,atrick/swift,xwu/swift,benlangmuir/swift,karwa/swift,gribozavr/swift,xwu/swift,aschwaighofer/swift,roambotics/swift,gribozavr/swift,parkera/swift,stephentyrone/swift,tkremenek/swift,rudkx/swift,apple/swift,sschiau/swift,airspeedswift/swift,devincoughlin/swift,lorentey/swift,hooman/swift,benlangmuir/swift,apple/swift,stephentyrone/swift,jckarter/swift,tkremenek/swift,aschwaighofer/swift,rudkx/swift,karwa/swift,jckarter/swift,stephentyrone/swift,hooman/swift,glessard/swift,CodaFi/swift,CodaFi/swift,parkera/swift,gribozavr/swift,parkera/swift,lorentey/swift,harlanhaskins/swift,nathawes/swift,parkera/swift,jckarter/swift,hooman/swift,JGiola/swift,sschiau/swift,ahoppen/swift,sschiau/swift,karwa/swift,tkremenek/swift,devincoughlin/swift,apple/swift,xwu/swift,harlanhaskins/swift,airspeedswift/swift,gregomni/swift,jmgc/swift,nathawes/swift,nathawes/swift,apple/swift,harlanhaskins/swift,JGiola/swift,apple/swift,sschiau/swift,atrick/swift,devincoughlin/swift,ahoppen/swift,gregomni/swift,karwa/swift,aschwaighofer/swift,sschiau/swift,karwa/swift,xwu/swift,harlanhaskins/swift