test: make Misc.dump_api pass on Windows
test: make Misc.dump_api pass on Windows

`diff` may be intercepted by lit which does not support the `-d` option.
This doesn't really help much for the line differences, so, remove the
`-d` option.  This allows the test to pass on Windows.

karwa/swift,apple/swift,lorentey/swift,jckarter/swift,apple/swift,glessard/swift,xwu/swift,shahmishal/swift,airspeedswift/swift,glessard/swift,karwa/swift,ahoppen/swift,airspeedswift/swift,xedin/swift,gribozavr/swift,ahoppen/swift,devincoughlin/swift,JGiola/swift,devincoughlin/swift,harlanhaskins/swift,rudkx/swift,devincoughlin/swift,atrick/swift,rudkx/swift,tkremenek/swift,JGiola/swift,shajrawi/swift,shahmishal/swift,jmgc/swift,xedin/swift,aschwaighofer/swift,tkremenek/swift,karwa/swift,harlanhaskins/swift,jckarter/swift,devincoughlin/swift,roambotics/swift,karwa/swift,roambotics/swift,xwu/swift,airspeedswift/swift,xwu/swift,allevato/swift,jmgc/swift,shajrawi/swift,gregomni/swift,allevato/swift,nathawes/swift,shajrawi/swift,CodaFi/swift,atrick/swift,stephentyrone/swift,ahoppen/swift,harlanhaskins/swift,shahmishal/swift,shajrawi/swift,jckarter/swift,parkera/swift,benlangmuir/swift,karwa/swift,jckarter/swift,harlanhaskins/swift,devincoughlin/swift,parkera/swift,tkremenek/swift,roambotics/swift,aschwaighofer/swift,tkremenek/swift,hooman/swift,tkremenek/swift,aschwaighofer/swift,parkera/swift,aschwaighofer/swift,CodaFi/swift,atrick/swift,jmgc/swift,sschiau/swift,nathawes/swift,xedin/swift,shajrawi/swift,sschiau/swift,JGiola/swift,shahmishal/swift,parkera/swift,apple/swift,benlangmuir/swift,gribozavr/swift,glessard/swift,jckarter/swift,gribozavr/swift,sschiau/swift,allevato/swift,xedin/swift,apple/swift,airspeedswift/swift,sschiau/swift,jmgc/swift,aschwaighofer/swift,stephentyrone/swift,nathawes/swift,benlangmuir/swift,devincoughlin/swift,xwu/swift,gregomni/swift,roambotics/swift,shahmishal/swift,rudkx/swift,atrick/swift,gribozavr/swift,gregomni/swift,gribozavr/swift,airspeedswift/swift,allevato/swift,xedin/swift,hooman/swift,jmgc/swift,CodaFi/swift,stephentyrone/swift,JGiola/swift,JGiola/swift,hooman/swift,allevato/swift,airspeedswift/swift,CodaFi/swift,jckarter/swift,benlangmuir/swift,gregomni/swift,hooman/swift,CodaFi/swift,benlangmuir/swift,hooman/swift,gregomni/swift,sschiau/swift,karwa/swift,stephentyrone/swift,xedin/swift,ahoppen/swift,allevato/swift,rudkx/swift,shajrawi/swift,karwa/swift,gribozavr/swift,xwu/swift,jmgc/swift,parkera/swift,shahmishal/swift,xedin/swift,glessard/swift,karwa/swift,aschwaighofer/swift,CodaFi/swift,rudkx/swift,harlanhaskins/swift,allevato/swift,harlanhaskins/swift,lorentey/swift,devincoughlin/swift,nathawes/swift,parkera/swift,devincoughlin/swift,roambotics/swift,airspeedswift/swift,ahoppen/swift,sschiau/swift,lorentey/swift,benlangmuir/swift,gregomni/swift,xwu/swift,ahoppen/swift,apple/swift,glessard/swift,stephentyrone/swift,glessard/swift,lorentey/swift,gribozavr/swift,tkremenek/swift,nathawes/swift,lorentey/swift,xedin/swift,sschiau/swift,jmgc/swift,hooman/swift,shajrawi/swift,stephentyrone/swift,lorentey/swift,nathawes/swift,shajrawi/swift,rudkx/swift,stephentyrone/swift,gribozavr/swift,atrick/swift,harlanhaskins/swift,xwu/swift,roambotics/swift,parkera/swift,shahmishal/swift,shahmishal/swift,parkera/swift,CodaFi/swift,aschwaighofer/swift,nathawes/swift,atrick/swift,tkremenek/swift,lorentey/swift,hooman/swift,apple/swift,jckarter/swift,lorentey/swift,sschiau/swift,JGiola/swift