Rewrite deduplicate_property_declarations to not require Mako.
Rewrite deduplicate_property_declarations to not require Mako.

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