style: Simplify the rule tree GC code a bit.
style: Simplify the rule tree GC code a bit.

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