[update-checkout] Remove some old configs that are no longer used.
[update-checkout] Remove some old configs that are no longer used.

The checkout configs included some old dated branches that are no longer
used. They are unlikely to work well anyway because the corresponding
Clang/LLVM branches moved forward independently. Remove those config entries.
Also re-order the 4.0 and 4.1 configs to be consistent.

jmgc/swift,jckarter/swift,allevato/swift,austinzheng/swift,harlanhaskins/swift,sschiau/swift,amraboelela/swift,glessard/swift,brentdax/swift,gribozavr/swift,brentdax/swift,benlangmuir/swift,stephentyrone/swift,airspeedswift/swift,karwa/swift,natecook1000/swift,ahoppen/swift,aschwaighofer/swift,harlanhaskins/swift,harlanhaskins/swift,harlanhaskins/swift,stephentyrone/swift,allevato/swift,benlangmuir/swift,JGiola/swift,xedin/swift,stephentyrone/swift,hooman/swift,alblue/swift,CodaFi/swift,xedin/swift,roambotics/swift,xwu/swift,lorentey/swift,JGiola/swift,devincoughlin/swift,atrick/swift,xwu/swift,jckarter/swift,danielmartin/swift,shajrawi/swift,gregomni/swift,natecook1000/swift,jckarter/swift,lorentey/swift,karwa/swift,gribozavr/swift,danielmartin/swift,rudkx/swift,shahmishal/swift,sschiau/swift,gribozavr/swift,sschiau/swift,roambotics/swift,roambotics/swift,aschwaighofer/swift,natecook1000/swift,austinzheng/swift,hooman/swift,rudkx/swift,airspeedswift/swift,benlangmuir/swift,jckarter/swift,alblue/swift,amraboelela/swift,nathawes/swift,alblue/swift,shajrawi/swift,glessard/swift,devincoughlin/swift,aschwaighofer/swift,hooman/swift,hooman/swift,aschwaighofer/swift,glessard/swift,lorentey/swift,sschiau/swift,atrick/swift,sschiau/swift,xwu/swift,benlangmuir/swift,shajrawi/swift,parkera/swift,natecook1000/swift,jmgc/swift,tkremenek/swift,austinzheng/swift,xwu/swift,natecook1000/swift,glessard/swift,ahoppen/swift,roambotics/swift,CodaFi/swift,danielmartin/swift,roambotics/swift,ahoppen/swift,xedin/swift,shajrawi/swift,nathawes/swift,shahmishal/swift,austinzheng/swift,practicalswift/swift,xedin/swift,hooman/swift,nathawes/swift,shahmishal/swift,amraboelela/swift,tkremenek/swift,airspeedswift/swift,shahmishal/swift,gregomni/swift,devincoughlin/swift,parkera/swift,gribozavr/swift,apple/swift,jckarter/swift,harlanhaskins/swift,jmgc/swift,ahoppen/swift,airspeedswift/swift,apple/swift,xedin/swift,allevato/swift,nathawes/swift,tkremenek/swift,natecook1000/swift,sschiau/swift,tkremenek/swift,austinzheng/swift,xedin/swift,airspeedswift/swift,lorentey/swift,brentdax/swift,jmgc/swift,gribozavr/swift,alblue/swift,atrick/swift,parkera/swift,shajrawi/swift,ahoppen/swift,stephentyrone/swift,amraboelela/swift,CodaFi/swift,xedin/swift,shahmishal/swift,CodaFi/swift,jckarter/swift,apple/swift,xwu/swift,harlanhaskins/swift,ahoppen/swift,karwa/swift,danielmartin/swift,gregomni/swift,karwa/swift,nathawes/swift,practicalswift/swift,lorentey/swift,practicalswift/swift,apple/swift,airspeedswift/swift,JGiola/swift,CodaFi/swift,glessard/swift,amraboelela/swift,sschiau/swift,gribozavr/swift,parkera/swift,harlanhaskins/swift,gregomni/swift,jmgc/swift,CodaFi/swift,practicalswift/swift,JGiola/swift,brentdax/swift,gregomni/swift,practicalswift/swift,tkremenek/swift,brentdax/swift,gregomni/swift,apple/swift,allevato/swift,amraboelela/swift,lorentey/swift,tkremenek/swift,karwa/swift,natecook1000/swift,shahmishal/swift,jckarter/swift,xwu/swift,allevato/swift,practicalswift/swift,aschwaighofer/swift,devincoughlin/swift,rudkx/swift,stephentyrone/swift,glessard/swift,jmgc/swift,JGiola/swift,devincoughlin/swift,karwa/swift,devincoughlin/swift,lorentey/swift,aschwaighofer/swift,shajrawi/swift,xwu/swift,airspeedswift/swift,roambotics/swift,atrick/swift,hooman/swift,rudkx/swift,karwa/swift,xedin/swift,danielmartin/swift,hooman/swift,rudkx/swift,parkera/swift,jmgc/swift,parkera/swift,devincoughlin/swift,allevato/swift,allevato/swift,gribozavr/swift,amraboelela/swift,austinzheng/swift,devincoughlin/swift,alblue/swift,rudkx/swift,benlangmuir/swift,shajrawi/swift,tkremenek/swift,shajrawi/swift,lorentey/swift,shahmishal/swift,stephentyrone/swift,stephentyrone/swift,parkera/swift,benlangmuir/swift,brentdax/swift,sschiau/swift,practicalswift/swift,atrick/swift,gribozavr/swift,danielmartin/swift,JGiola/swift,shahmishal/swift,austinzheng/swift,alblue/swift,brentdax/swift,danielmartin/swift,CodaFi/swift,aschwaighofer/swift,nathawes/swift,atrick/swift,alblue/swift,apple/swift,practicalswift/swift,karwa/swift,nathawes/swift,parkera/swift