Revert "Verify in DiagnosticHashMap::drop."
Revert "Verify in DiagnosticHashMap::drop."

This reverts commit c9b5ffb58691dc30e370a989dd0a23aad6b26a4a.

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