[XCTest overlay] Remove extraneous XCAssert(Not)Equal overloads.
[XCTest overlay] Remove extraneous XCAssert(Not)Equal overloads.

XCTest had XCAssert(Not)Equal overloads for optionals, arrays
(including contiguous arrays and array slices), and dictionaries to
work around the lack of conditional conformances to Equatable. Now
that we have the latter, remove the former.

Fixes rdar://problem/17924430.

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