[CMake] remove redundant job pooling check
[CMake] remove redundant job pooling check

Minimum supported version is 3.4.3

xedin/swift,lorentey/swift,hooman/swift,danielmartin/swift,tjw/swift,hooman/swift,karwa/swift,sschiau/swift,aschwaighofer/swift,djwbrown/swift,practicalswift/swift,ahoppen/swift,xwu/swift,nathawes/swift,jtbandes/swift,bitjammer/swift,sschiau/swift,benlangmuir/swift,harlanhaskins/swift,deyton/swift,xwu/swift,uasys/swift,tkremenek/swift,jckarter/swift,harlanhaskins/swift,shajrawi/swift,huonw/swift,zisko/swift,hughbe/swift,zisko/swift,return/swift,xwu/swift,parkera/swift,stephentyrone/swift,calebd/swift,amraboelela/swift,tjw/swift,stephentyrone/swift,shahmishal/swift,brentdax/swift,arvedviehweger/swift,calebd/swift,lorentey/swift,sschiau/swift,airspeedswift/swift,airspeedswift/swift,gregomni/swift,amraboelela/swift,brentdax/swift,shajrawi/swift,return/swift,arvedviehweger/swift,brentdax/swift,arvedviehweger/swift,JGiola/swift,CodaFi/swift,rudkx/swift,CodaFi/swift,xwu/swift,austinzheng/swift,rudkx/swift,milseman/swift,gribozavr/swift,allevato/swift,codestergit/swift,hughbe/swift,bitjammer/swift,JGiola/swift,gregomni/swift,codestergit/swift,atrick/swift,tkremenek/swift,atrick/swift,gregomni/swift,shajrawi/swift,natecook1000/swift,allevato/swift,jtbandes/swift,OscarSwanros/swift,xwu/swift,OscarSwanros/swift,apple/swift,jopamer/swift,jmgc/swift,roambotics/swift,return/swift,uasys/swift,return/swift,return/swift,jmgc/swift,nathawes/swift,amraboelela/swift,tjw/swift,JGiola/swift,apple/swift,milseman/swift,frootloops/swift,calebd/swift,swiftix/swift,shahmishal/swift,jtbandes/swift,codestergit/swift,tinysun212/swift-windows,hooman/swift,benlangmuir/swift,Jnosh/swift,codestergit/swift,calebd/swift,karwa/swift,hughbe/swift,airspeedswift/swift,tjw/swift,huonw/swift,nathawes/swift,CodaFi/swift,devincoughlin/swift,jckarter/swift,airspeedswift/swift,jmgc/swift,Jnosh/swift,frootloops/swift,Jnosh/swift,OscarSwanros/swift,djwbrown/swift,harlanhaskins/swift,bitjammer/swift,lorentey/swift,djwbrown/swift,gribozavr/swift,sschiau/swift,milseman/swift,nathawes/swift,huonw/swift,tjw/swift,sschiau/swift,parkera/swift,alblue/swift,uasys/swift,jtbandes/swift,huonw/swift,jopamer/swift,benlangmuir/swift,glessard/swift,frootloops/swift,calebd/swift,lorentey/swift,atrick/swift,parkera/swift,aschwaighofer/swift,tinysun212/swift-windows,practicalswift/swift,manavgabhawala/swift,jckarter/swift,airspeedswift/swift,frootloops/swift,calebd/swift,alblue/swift,austinzheng/swift,gribozavr/swift,hughbe/swift,shahmishal/swift,airspeedswift/swift,danielmartin/swift,huonw/swift,manavgabhawala/swift,gregomni/swift,felix91gr/swift,deyton/swift,milseman/swift,manavgabhawala/swift,parkera/swift,hooman/swift,atrick/swift,tinysun212/swift-windows,tinysun212/swift-windows,codestergit/swift,danielmartin/swift,glessard/swift,arvedviehweger/swift,natecook1000/swift,gregomni/swift,roambotics/swift,tinysun212/swift-windows,gribozavr/swift,swiftix/swift,zisko/swift,swiftix/swift,shajrawi/swift,felix91gr/swift,codestergit/swift,allevato/swift,austinzheng/swift,devincoughlin/swift,hughbe/swift,glessard/swift,hughbe/swift,tinysun212/swift-windows,CodaFi/swift,karwa/swift,karwa/swift,natecook1000/swift,shahmishal/swift,deyton/swift,roambotics/swift,brentdax/swift,apple/swift,zisko/swift,jmgc/swift,ahoppen/swift,practicalswift/swift,manavgabhawala/swift,karwa/swift,natecook1000/swift,djwbrown/swift,rudkx/swift,CodaFi/swift,ahoppen/swift,devincoughlin/swift,karwa/swift,xedin/swift,glessard/swift,bitjammer/swift,ahoppen/swift,rudkx/swift,milseman/swift,brentdax/swift,swiftix/swift,jopamer/swift,return/swift,tkremenek/swift,nathawes/swift,lorentey/swift,JGiola/swift,uasys/swift,devincoughlin/swift,shahmishal/swift,hooman/swift,allevato/swift,amraboelela/swift,sschiau/swift,practicalswift/swift,apple/swift,manavgabhawala/swift,manavgabhawala/swift,benlangmuir/swift,uasys/swift,airspeedswift/swift,arvedviehweger/swift,allevato/swift,felix91gr/swift,lorentey/swift,djwbrown/swift,allevato/swift,djwbrown/swift,jopamer/swift,austinzheng/swift,stephentyrone/swift,nathawes/swift,atrick/swift,djwbrown/swift,practicalswift/swift,tkremenek/swift,devincoughlin/swift,xedin/swift,bitjammer/swift,deyton/swift,deyton/swift,roambotics/swift,jckarter/swift,alblue/swift,gregomni/swift,felix91gr/swift,shahmishal/swift,rudkx/swift,OscarSwanros/swift,apple/swift,tinysun212/swift-windows,huonw/swift,parkera/swift,gribozavr/swift,deyton/swift,frootloops/swift,alblue/swift,aschwaighofer/swift,devincoughlin/swift,aschwaighofer/swift,gribozavr/swift,frootloops/swift,CodaFi/swift,calebd/swift,return/swift,zisko/swift,Jnosh/swift,bitjammer/swift,hooman/swift,swiftix/swift,devincoughlin/swift,brentdax/swift,amraboelela/swift,manavgabhawala/swift,xedin/swift,jmgc/swift,xedin/swift,natecook1000/swift,karwa/swift,xedin/swift,xedin/swift,stephentyrone/swift,jopamer/swift,shajrawi/swift,uasys/swift,amraboelela/swift,amraboelela/swift,jopamer/swift,benlangmuir/swift,arvedviehweger/swift,parkera/swift,gribozavr/swift,xwu/swift,OscarSwanros/swift,jckarter/swift,natecook1000/swift,stephentyrone/swift,practicalsw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