Auto merge of #18584 - hiikezoe:drop-rule-changed, r=emilio
Auto merge of #18584 - hiikezoe:drop-rule-changed, r=emilio

Drop RulesChanged

It's no longer used.

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- [X] These changes do not require tests because this just drops unused code.

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