[gardening][Calendar] No need to discard the retrun value of `insert(_:)` which is discardable
[gardening][Calendar] No need to discard the retrun value of `insert(_:)` which is discardable

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