[gardening] Remove HasAnyDecls()
[gardening] Remove HasAnyDecls()

The last in-repo usage was removed in 6328f3f

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