[runtime] Delete unused _swift_fmod*().
[runtime] Delete unused _swift_fmod*().

These were once used by some func %() implementations.

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