Auto merge of #7386 - Ms2ger:emitter, r=jdm
Auto merge of #7386 - Ms2ger:emitter, r=jdm

Remove Emitter::markers.

The vector is filled in and immediately emptied again. It is clearer to
keep the vector in the caller instead.

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bjwbell/servo,jimberlage/servo,eddyb/servo,avadacatavra/servo,larsbergstrom/servo,youprofit/servo,mattnenterprise/servo,notriddle/servo,caldwell/servo,dsandeephegde/servo,peterjoel/servo,upsuper/servo,dagnir/servo,sadmansk/servo,steveklabnik/servo,emilio/servo,walac/servo,paulrouget/servo,paulrouget/servo,paulrouget/servo,dati91/servo,saneyuki/servo,nrc/servo,jlegendary/servo,dagnir/servo,fiji-flo/servo,j3parker/servo,emilio/servo,eddyb/servo,ConnorGBrewster/servo,caldwell/servo,upsuper/servo,walac/servo,paulrouget/servo,dati91/servo,paulrouget/servo,RenaudParis/servo,SimonSapin/servo,cbrewster/servo,steveklabnik/servo,DominoTree/servo,runarberg/servo,larsbergstrom/servo,CJ8664/servo,brendandahl/servo,meh/servo,brendandahl/servo,walac/servo,ConnorGBrewster/servo,KiChjang/servo,DominoTree/servo,canaltinova/servo,jdramani/servo,upsuper/servo,sadmansk/servo,anthgur/servo,rnestler/servo,mbrubeck/servo,dati91/servo,splav/servo,brendandahl/servo,splav/servo,sadmansk/servo,ConnorGBrewster/servo,DominoTree/servo,caldwell/servo,canaltinova/servo,canaltinova/servo,DominoTree/servo,peterjoel/servo,mattnenterprise/servo,jdramani/servo,WriterOfAlicrow/servo,anthgur/servo,avadacatavra/servo,paulrouget/servo,emilio/servo,dati91/servo,dhananjay92/servo,jimberlage/servo,mbrubeck/servo,GyrosOfWar/servo,fiji-flo/servo,runarberg/servo,emilio/servo,SimonSapin/servo,nnethercote/servo,RenaudParis/servo,dagnir/servo,CJ8664/servo,youprofit/servo,avadacatavra/servo,dsandeephegde/servo,RenaudParis/servo,splav/servo,szeged/servo,jlegendary/servo,CJ8664/servo,paulrouget/servo,dsandeephegde/servo,SimonSapin/servo,GyrosOfWar/servo,SimonSapin/servo,nnethercote/servo,szeged/servo,meh/servo,KiChjang/servo,fiji-flo/servo,pyfisch/servo,jimberlage/servo,walac/servo,WriterOfAlicrow/servo,dsandeephegde/servo,jimberlage/servo,larsbergstrom/servo,canaltinova/servo,notriddle/servo,pyfisch/servo,huonw/servo,AnthonyBroadCrawford/servo,anthgur/servo,dagnir/servo,thiagopnts/servo,rnestler/servo,runarberg/servo,jlegendary/servo,runarberg/servo,saneyuki/servo,larsbergstrom/servo,DominoTree/servo,nrc/servo,aidanhs/servo,CJ8664/servo,emilio/servo,jimberlage/servo,mattnenterprise/servo,notriddle/servo,bjwbell/servo,aidanhs/servo,upsuper/servo,mbrubeck/servo,aidanhs/servo,thiagopnts/servo,rnestler/servo,SimonSapin/servo,j3parker/servo,upsuper/servo,szeged/servo,CJ8664/servo,szeged/servo,fiji-flo/servo,eddyb/servo,steveklabnik/servo,pyfisch/servo,mattnenterprise/servo,mattnenterprise/servo,anthgur/servo,RenaudParis/servo,nrc/servo,mattnenterprise/servo,jdramani/servo,rnestler/servo,eddyb/servo,jimberlage/servo,upsuper/servo,thiagopnts/servo,upsuper/servo,saneyuki/servo,meh/servo,KiChjang/servo,runarberg/servo,avadacatavra/servo,KiChjang/servo,dagnir/servo,pyfisch/servo,RenaudParis/servo,jlegendary/servo,mbrubeck/servo,peterjoel/servo,aidanhs/servo,KiChjang/servo,pyfisch/servo,thiagopnts/servo,nnethercote/servo,KiChjang/servo,szeged/servo,splav/servo,WriterOfAlicrow/servo,nnethercote/servo,sadmansk/servo,thiagopnts/servo,eddyb/servo,RenaudParis/servo,meh/servo,KiChjang/servo,meh/servo,nnethercote/servo,dagnir/servo,rnestler/servo,cbrewster/servo,nnethercote/servo,bjwbell/servo,pyfisch/servo,runarberg/servo,GyrosOfWar/servo,saneyuki/servo,pyfisch/servo,cbrewster/servo,dhananjay92/servo,pyfisch/servo,GyrosOfWar/servo,emilio/servo,fiji-flo/servo,mbrubeck/servo,j3parker/servo,sadmansk/servo,canaltinova/servo,GyrosOfWar/servo,szeged/servo,SimonSapin/servo,KiChjang/servo,DominoTree/servo,huonw/servo,WriterOfAlicrow/servo,AnthonyBroadCrawford/servo,nnethercote/servo,thiagopnts/servo,meh/servo,youprofit/servo,saneyuki/servo,KiChjang/servo,dhananjay92/servo,saneyuki/servo,cbrewster/servo,szeged/servo,notriddle/servo,dati91/servo,notriddle/servo,cbrewster/servo,splav/servo,jimberlage/servo,peterjoel/servo,canaltinova/servo,WriterOfAlicrow/servo,dsandeephegde/servo,peterjoel/servo,aidanhs/servo,bjwbell/servo,brendandahl/servo,thiagopnts/servo,anthgur/servo,sadmansk/servo,youprofit/servo,cbrewster/servo,dsandeephegde/servo,anthgur/servo,AnthonyBroadCrawford/servo,jdramani/servo,rnestler/servo,dati91/servo,avadacatavra/servo,ConnorGBrewster/servo,jlegendary/servo,larsbergstrom/servo,j3parker/servo,caldwell/servo,ConnorGBrewster/servo,thiagopnts/servo,emilio/servo,jdramani/servo,avadacatavra/servo,nrc/servo,avadacatavra/servo,youprofit/servo,cbrewster/servo,AnthonyBroadCrawford/servo,steveklabnik/servo,meh/servo,peterjoel/servo,brendandahl/servo,CJ8664/servo,huonw/servo,nnethercote/servo,mattnenterprise/servo,GyrosOfWar/servo,aidanhs/servo,j3parker/servo,cbrewster/servo,notriddle/servo,AnthonyBroadCrawford/servo,szeged/servo,bjwbell/servo,emilio/servo,paulrouget/servo,szeged/servo,huonw/servo,huonw/servo,larsbergstrom/servo,peterjoel/servo,fiji-flo/servo,larsbergstrom/servo,emilio/servo,WriterOfAlicrow/servo,walac/servo,brendandahl/servo,AnthonyBroadCrawford/servo,splav/servo,pyfisch/servo,eddyb/servo,larsbergstrom/servo,walac/servo,emilio/servo,CJ8664/servo,DominoTree/serv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