remove platform from appveyor.yml
remove platform from appveyor.yml

KiChjang/servo,eddyb/servo,ConnorGBrewster/servo,fiji-flo/servo,emilio/servo,dati91/servo,paulrouget/servo,sadmansk/servo,saneyuki/servo,paulrouget/servo,DominoTree/servo,pyfisch/servo,szeged/servo,pyfisch/servo,jimberlage/servo,dsandeephegde/servo,DominoTree/servo,paulrouget/servo,cbrewster/servo,fiji-flo/servo,paulrouget/servo,dsandeephegde/servo,pyfisch/servo,nnethercote/servo,DominoTree/servo,rnestler/servo,paulrouget/servo,szeged/servo,pyfisch/servo,rnestler/servo,mattnenterprise/servo,emilio/servo,notriddle/servo,larsbergstrom/servo,fiji-flo/servo,larsbergstrom/servo,KiChjang/servo,KiChjang/servo,splav/servo,peterjoel/servo,sadmansk/servo,larsbergstrom/servo,nnethercote/servo,mbrubeck/servo,anthgur/servo,mbrubeck/servo,SimonSapin/servo,saneyuki/servo,sadmansk/servo,upsuper/servo,jimberlage/servo,notriddle/servo,szeged/servo,upsuper/servo,emilio/servo,jimberlage/servo,nnethercote/servo,dsandeephegde/servo,upsuper/servo,rnestler/servo,mattnenterprise/servo,thiagopnts/servo,KiChjang/servo,jimberlage/servo,CJ8664/servo,dati91/servo,CJ8664/servo,saneyuki/servo,emilio/servo,rnestler/servo,SimonSapin/servo,jimberlage/servo,pyfisch/servo,SimonSapin/servo,mattnenterprise/servo,CJ8664/servo,mattnenterprise/servo,thiagopnts/servo,notriddle/servo,CJ8664/servo,eddyb/servo,thiagopnts/servo,fiji-flo/servo,KiChjang/servo,jimberlage/servo,sadmansk/servo,larsbergstrom/servo,cbrewster/servo,larsbergstrom/servo,mattnenterprise/servo,canaltinova/servo,splav/servo,rnestler/servo,DominoTree/servo,nnethercote/servo,dati91/servo,dati91/servo,mbrubeck/servo,KiChjang/servo,anthgur/servo,rnestler/servo,anthgur/servo,emilio/servo,emilio/servo,peterjoel/servo,canaltinova/servo,ConnorGBrewster/servo,ConnorGBrewster/servo,eddyb/servo,szeged/servo,anthgur/servo,nnethercote/servo,CJ8664/servo,avadacatavra/servo,peterjoel/servo,mbrubeck/servo,avadacatavra/servo,saneyuki/servo,dsandeephegde/servo,sadmansk/servo,notriddle/servo,saneyuki/servo,emilio/servo,jimberlage/servo,DominoTree/servo,emilio/servo,pyfisch/servo,notriddle/servo,saneyuki/servo,mattnenterprise/servo,canaltinova/servo,splav/servo,CJ8664/servo,saneyuki/servo,splav/servo,avadacatavra/servo,sadmansk/servo,peterjoel/servo,mbrubeck/servo,nnethercote/servo,thiagopnts/servo,DominoTree/servo,sadmansk/servo,peterjoel/servo,ConnorGBrewster/servo,splav/servo,DominoTree/servo,pyfisch/servo,upsuper/servo,eddyb/servo,mbrubeck/servo,nnethercote/servo,splav/servo,notriddle/servo,avadacatavra/servo,fiji-flo/servo,dati91/servo,dati91/servo,KiChjang/servo,upsuper/servo,larsbergstrom/servo,notriddle/servo,avadacatavra/servo,avadacatavra/servo,cbrewster/servo,paulrouget/servo,cbrewster/servo,peterjoel/servo,SimonSapin/servo,splav/servo,saneyuki/servo,eddyb/servo,thiagopnts/servo,szeged/servo,CJ8664/servo,fiji-flo/servo,dati91/servo,dsandeephegde/servo,rnestler/servo,anthgur/servo,szeged/servo,pyfisch/servo,saneyuki/servo,ConnorGBrewster/servo,mbrubeck/servo,mattnenterprise/servo,nnethercote/servo,SimonSapin/servo,jimberlage/servo,rnestler/servo,notriddle/servo,upsuper/servo,jimberlage/servo,thiagopnts/servo,ConnorGBrewster/servo,pyfisch/servo,saneyuki/servo,avadacatavra/servo,notriddle/servo,szeged/servo,thiagopnts/servo,nnethercote/servo,cbrewster/servo,dsandeephegde/servo,anthgur/servo,SimonSapin/servo,splav/servo,cbrewster/servo,notriddle/servo,eddyb/servo,peterjoel/servo,nnethercote/servo,larsbergstrom/servo,pyfisch/servo,ConnorGBrewster/servo,emilio/servo,DominoTree/servo,eddyb/servo,thiagopnts/servo,DominoTree/servo,larsbergstrom/servo,anthgur/servo,upsuper/servo,sadmansk/servo,peterjoel/servo,fiji-flo/servo,splav/servo,ConnorGBrewster/servo,SimonSapin/servo,dsandeephegde/servo,canaltinova/servo,dsandeephegde/servo,splav/servo,szeged/servo,szeged/servo,mattnenterprise/servo,anthgur/servo,peterjoel/servo,szeged/servo,upsuper/servo,larsbergstrom/servo,paulrouget/servo,paulrouget/servo,paulrouget/servo,larsbergstrom/servo,DominoTree/servo,paulrouget/servo,fiji-flo/servo,KiChjang/servo,CJ8664/servo,eddyb/servo,canaltinova/servo,cbrewster/servo,emilio/servo,canaltinova/servo,KiChjang/servo,mbrubeck/servo,avadacatavra/servo,canaltinova/servo,canaltinova/servo,dati91/servo,peterjoel/servo,cbrewster/servo,KiChjang/servo,SimonSapin/servo