Auto merge of #18873 - heycam:rm-gsv-check, r=emilio
Auto merge of #18873 - heycam:rm-gsv-check, r=emilio

style: Remove Servo_GetStyleVariables test special case.

This function disappeared a while ago.

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