[Typechecker] Remove a few unnecessary isTypeContext() checks as its implifed by isInstanceMember()
[Typechecker] Remove a few unnecessary isTypeContext() checks as its implifed by isInstanceMember()

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