Remove the core feature from reftests.
Remove the core feature from reftests.

walac/servo,saratang/servo,saratang/servo,sadmansk/servo,DominoTree/servo,wartman4404/servo,youprofit/servo,pyfisch/servo,KiChjang/servo,paulrouget/servo,kindersung/servo,boghison/servo,dagnir/servo,notriddle/servo,vks/servo,KiChjang/servo,indykish/servo,ConnorGBrewster/servo,indykish/servo,zhangjunlei26/servo,nnethercote/servo,j3parker/servo,rixrix/servo,upsuper/servo,peterjoel/servo,wartman4404/servo,echochamber/servo,fiji-flo/servo,zhangjunlei26/servo,codemac/servo,rixrix/servo,paulrouget/servo,nrc/servo,sadmansk/servo,echochamber/servo,aidanhs/servo,walac/servo,rixrix/servo,walac/servo,caldwell/servo,tempbottle/servo,pyfisch/servo,brendandahl/servo,brendandahl/servo,huonw/servo,cbrewster/servo,pyecs/servo,mdibaiee/servo,AnthonyBroadCrawford/servo,pyecs/servo,thiagopnts/servo,tschneidereit/servo,emilio/servo,emilio/servo,runarberg/servo,jdramani/servo,saneyuki/servo,ryancanhelpyou/servo,huonw/servo,larsbergstrom/servo,pgonda/servo,SimonSapin/servo,nnethercote/servo,deokjinkim/servo,mbrubeck/servo,aidanhs/servo,jlegendary/servo,jgraham/servo,nrc/servo,saneyuki/servo,mt2d2/servo,rixrix/servo,SimonSapin/servo,WriterOfAlicrow/servo,ConnorGBrewster/servo,wartman4404/servo,mt2d2/servo,dvberkel/servo,nick-thompson/servo,nerith/servo,codemac/servo,echochamber/servo,s142857/servo,karlito40/servo,jdramani/servo,splav/servo,boghison/servo,kindersung/servo,runarberg/servo,dati91/servo,szeged/servo,eddyb/servo,pyfisch/servo,nick-thompson/servo,saratang/servo,rixrix/servo,notriddle/servo,huonw/servo,GyrosOfWar/servo,WriterOfAlicrow/servo,aidanhs/servo,CJ8664/servo,dati91/servo,youprofit/servo,nrc/servo,jgraham/servo,tempbottle/servo,peterjoel/servo,hyowon/servo,samfoo/servo,vks/servo,sadmansk/servo,steveklabnik/servo,AnthonyBroadCrawford/servo,SimonSapin/servo,s142857/servo,CJ8664/servo,samfoo/servo,rentongzhang/servo,s142857/servo,tafia/servo,jlegendary/servo,rnestler/servo,DominoTree/servo,emilio/servo,pyfisch/servo,szeged/servo,larsbergstrom/servo,saneyuki/servo,KiChjang/servo,sadmansk/servo,rnestler/servo,peterjoel/servo,splav/servo,s142857/servo,j3parker/servo,meh/servo,nnethercote/servo,splav/servo,kindersung/servo,upsuper/servo,runarberg/servo,tempbottle/servo,aweinstock314/servo,mbrubeck/servo,larsbergstrom/servo,dsandeephegde/servo,aidanhs/servo,vks/servo,nick-thompson/servo,GreenRecycleBin/servo,jimberlage/servo,codemac/servo,ConnorGBrewster/servo,tschneidereit/servo,pgonda/servo,tafia/servo,saratang/servo,samfoo/servo,vks/servo,dagnir/servo,dati91/servo,vks/servo,notriddle/servo,GreenRecycleBin/servo,ConnorGBrewster/servo,jgraham/servo,codemac/servo,saneyuki/servo,runarberg/servo,WriterOfAlicrow/servo,GyrosOfWar/servo,GyrosOfWar/servo,walac/servo,anthgur/servo,KiChjang/servo,emilio/servo,dsandeephegde/servo,jdramani/servo,WriterOfAlicrow/servo,saneyuki/servo,paulrouget/servo,jimberlage/servo,evilpie/servo,bjwbell/servo,jlegendary/servo,SimonSapin/servo,zentner-kyle/servo,bjwbell/servo,nnethercote/servo,dsandeephegde/servo,deokjinkim/servo,dsandeephegde/servo,nnethercote/servo,nrc/servo,GreenRecycleBin/servo,eddyb/servo,paulrouget/servo,emilio/servo,pyecs/servo,A-deLuna/servo,WriterOfAlicrow/servo,jgraham/servo,mdibaiee/servo,cbrewster/servo,tempbottle/servo,szeged/servo,pyecs/servo,rnestler/servo,wpgallih/servo,GreenRecycleBin/servo,wpgallih/servo,A-deLuna/servo,thiagopnts/servo,ConnorGBrewster/servo,A-deLuna/servo,caldwell/servo,samfoo/servo,mt2d2/servo,avadacatavra/servo,pyecs/servo,aweinstock314/servo,wartman4404/servo,dvberkel/servo,indykish/servo,meh/servo,nnethercote/servo,peterjoel/servo,dati91/servo,jgraham/servo,DominoTree/servo,caldwell/servo,wpgallih/servo,mattnenterprise/servo,jlegendary/servo,canaltinova/servo,meh/servo,vks/servo,peterjoel/servo,codemac/servo,dhananjay92/servo,paulrouget/servo,steveklabnik/servo,szeged/servo,tschneidereit/servo,GyrosOfWar/servo,echochamber/servo,zentner-kyle/servo,nnethercote/servo,cbrewster/servo,sadmansk/servo,jimberlage/servo,zhangjunlei26/servo,dagnir/servo,notriddle/servo,wpgallih/servo,boghison/servo,larsbergstrom/servo,mattnenterprise/servo,dhananjay92/servo,srbhklkrn/SERVOENGINE,hyowon/servo,saratang/servo,aweinstock314/servo,peterjoel/servo,rentongzhang/servo,hyowon/servo,pgonda/servo,tafia/servo,j3parker/servo,thiagopnts/servo,AnthonyBroadCrawford/servo,nick-thompson/servo,SimonSapin/servo,karlito40/servo,steveklabnik/servo,aidanhs/servo,RenaudParis/servo,j3parker/servo,nerith/servo,zhangjunlei26/servo,mbrubeck/servo,zentner-kyle/servo,DominoTree/servo,ConnorGBrewster/servo,RenaudParis/servo,KiChjang/servo,rnestler/servo,runarberg/servo,fiji-flo/servo,GreenRecycleBin/servo,splav/servo,jimberlage/servo,KiChjang/servo,dsandeephegde/servo,szeged/servo,SimonSapin/servo,rentongzhang/servo,indykish/servo,pyecs/servo,ryancanhelpyou/servo,cbrewster/servo,zentner-kyle/servo,steveklabnik/servo,CJ8664/servo,akosel/servo,fiji-flo/servo,szeged/servo,KiChjang/servo,anthgur/servo,DominoTree/servo,saratang/servo,SimonSapin/servo,aidanhs/servo,anthgur/servo,larsbergstrom/servo,akosel/servo,szeged/servo,evilpie/servo,boghison/servo,paulrouget/servo,nerith/servo,dagnir/servo,akosel/servo,eddyb/servo,walac/servo,rixrix/servo,GyrosOfWar/servo,jimberlage/servo,thiagopnts/servo,g-k/servo,indykish/servo,mattnenterprise/servo,nerith/servo,zentner-kyle/servo,wpgallih/servo,akosel/servo,evilpie/servo,mdibaiee/servo,upsuper/servo,tempbottle/servo,kindersung/servo,jgraham/servo,srbhklkrn/SERVOENGINE,caldwell/servo,mbrubeck/servo,szeged/servo,zhangjunlei26/servo,anthgur/servo,larsbergstrom/servo,tafia/servo,karlito40/servo,GreenRecycleBin/servo,huonw/servo,kindersung/servo,pyfisch/servo,youprofit/servo,mbrubeck/servo,bjwbell/servo,RenaudParis/servo,hyowon/servo,splav/servo,emilio/servo,wartman4404/servo,saratang/servo,eddyb/servo,canaltinova/servo,g-k/servo,mbrubeck/servo,mt2d2/servo,srbhklkrn/SERVOENGINE,tempbottle/servo,splav/servo,upsuper/servo,evilpie/servo,dsandeephegde/servo,karlito40/servo,szeged/servo,emilio/servo,nerith/servo,larsbergstrom/servo,GreenRecycleBin/servo,steveklabnik/servo,fiji-flo/servo,rentongzhang/servo,ConnorGBrewster/servo,mdibaiee/servo,aweinstock314/servo,larsbergstrom/servo,KiChjang/servo,canaltinova/servo,s142857/servo,pgonda/servo,WriterOfAlicrow/servo,anthgur/servo,AnthonyBroadCrawford/servo,jlegendary/servo,samfoo/servo,g-k/servo,aidanhs/servo,caldwell/servo,ryancanhelpyou/servo,nick-thompson/servo,thiagopnts/servo,dvberkel/servo,youprofit/servo,zentner-kyle/servo,g-k/servo,avadacatavra/servo,indykish/servo,jimberlage/servo,GyrosOfWar/servo,s142857/servo,upsuper/servo,dhananjay92/servo,j3parker/servo,dvberkel/servo,vks/servo,paulrouget/servo,pyfisch/servo,meh/servo,kindersung/servo,peterjoel/servo,g-k/servo,evilpie/servo,GreenRecycleBin/servo,rentongzhang/servo,g-k/servo,deokjinkim/servo,brendandahl/servo,avadacatavra/servo,cbrewster/servo,dagnir/servo,s142857/servo,jimberlage/servo,jdramani/servo,KiChjang/servo,nick-thompson/servo,jimberlage/servo,AnthonyBroadCrawford/servo,brendandahl/servo,nnethercote/servo,echochamber/servo,CJ8664/servo,mdibaiee/servo,emilio/servo,paulrouget/servo,jdramani/servo,karlito40/servo,j3parker/servo,wartman4404/servo,emilio/servo,indykish/servo,deokjinkim/servo,steveklabnik/servo,canaltinova/servo,peterjoel/servo,kindersung/servo,steveklabnik/servo,DominoTree/servo,SimonSapin/servo,dati91/servo,nrc/servo,srbhklkrn/SERVOENGINE,hyowon/servo,boghison/servo,rixrix/servo,fiji-flo/servo,boghison/servo,ryancanhelpyou/servo,pgonda/servo,avadacatavra/servo,mt2d2/servo,CJ8664/servo,pyfisch/servo,walac/servo,fiji-flo/servo,akosel/servo,aweinstock314/servo,dvberkel/servo,indykish/servo,saneyuki/servo,DominoTree/servo,zhangjunlei26/servo,avadacatavra/servo,walac/servo,splav/servo,notriddle/servo,nick-thompson/servo,GyrosOfWar/servo,ConnorGBrewster/servo,paulrouget/servo,meh/servo,echochamber/servo,samfoo/servo,thiagopnts/servo,pyfisch/servo,eddyb/servo,DominoTree/servo,mattnenterprise/servo,brendandahl/servo,upsuper/servo,ryancanhelpyou/servo,notriddle/servo,dsandeephegde/servo,jlegendary/servo,dhananjay92/servo,thiagopnts/servo,codemac/servo,j3parker/servo,notriddle/servo,pgonda/servo,bjwbell/servo,RenaudParis/servo,codemac/servo,nerith/servo,nnethercote/servo,tschneidereit/servo,tafia/servo,rnestler/servo,AnthonyBroadCrawford/servo,anthgur/servo,mattnenterprise/servo,fiji-flo/servo,dvberkel/servo,canaltinova/servo,splav/servo,DominoTree/servo,avadacatavra/servo,nerith/servo,saneyuki/servo,rnestler/servo,aweinstock314/servo,bjwbell/servo,ryancanhelpyou/servo,mt2d2/servo,huonw/servo,pyfisch/servo,tschneidereit/servo,RenaudParis/servo,jdramani/servo,wpgallih/servo,rentongzhang/servo,saneyuki/servo,bjwbell/servo,WriterOfAlicrow/servo,dhananjay92/servo,pyecs/servo,canaltinova/servo,jdramani/servo,paulrouget/servo,tempbottle/servo,splav/servo,huonw/servo,cbrewster/servo,avadacatavra/servo,indykish/servo,dati91/servo,peterjoel/servo,mattnenterprise/servo,RenaudParis/servo,deokjinkim/servo,nrc/servo,mattnenterprise/servo,dhananjay92/servo,caldwell/servo,wpgallih/servo,jimberlage/servo,tafia/servo,dhananjay92/servo,mdibaiee/servo,caldwell/servo,mattnenterprise/servo,meh/servo,rixrix/servo,thiagopnts/servo,evilpie/servo,g-k/servo,echochamber/servo,A-deLuna/servo,RenaudParis/servo,dagnir/servo,mbrubeck/servo,mbrubeck/servo,tafia/servo,deokjinkim/servo,srbhklkrn/SERVOENGINE,nnethercote/servo,mt2d2/servo,upsuper/servo,eddyb/servo,deokjinkim/servo,evilpie/servo,zhangjunlei26/servo,AnthonyBroadCrawford/servo,notriddle/servo,runarberg/servo,rixrix/servo,srbhklkrn/SERVOENGINE,canaltinova/servo,akosel/servo,sadmansk/servo,youprofit/servo,tschneidereit/servo,eddyb/servo,boghison/servo,zhangjunlei26/servo,meh/servo,saneyuki/servo,brendandahl/servo,emilio/servo,sadmansk/servo,hyowon/servo,dagnir/servo,pgonda/servo,karlito40/servo,samfoo/servo,wpgallih/servo,pyfisch/servo,srbhklkrn/SERVOENGINE,hyowon/servo,rentongzhang/servo,rnestler/servo,zhangjunlei26/servo,tschneidereit/servo,akosel/servo,CJ8664/servo,bjwbell/servo,anthgur/servo,brendandahl/servo,runarberg/servo,larsbergstrom/servo,A-deLuna/servo,szeged/servo,ryancanhelpyou/servo,splav/servo,youprofit/servo,jlegendary/servo,cbrewster/servo,larsbergstrom/servo,A-deLuna/servo,jgraham/servo,notriddle/servo,avadacatavra/servo,cbrewster/servo,karlito40/servo,youprofit/servo,peterjoel/servo,wpgallih/servo,eddyb/servo,DominoTree/servo,huonw/servo,dati91/servo,dvberkel/servo,GreenRecycleBin/servo,sadmansk/servo,rnestler/servo,saneyuki/servo,notriddle/servo,zentner-kyle/servo,A-deLuna/servo,dati91/servo,canaltinova/servo,CJ8664/servo,aweinstock314/servo,wartman4404/servo,evilpie/servo,dsandeephegde/servo,evilpie/servo,KiChjang/servo,CJ8664/servo,nrc/servo,anthgur/servo,mdibaiee/servo,fiji-flo/servo,upsuper/servo