Auto merge of #6450 - pyfisch:patch-1, r=metajack
Auto merge of #6450 - pyfisch:patch-1, r=metajack

Remove is_some() from mime_classifier.rs



<!-- Reviewable:start -->
[<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/servo/servo/6450)
<!-- Reviewable:end -->

steveklabnik/servo,tempbottle/servo,jimberlage/servo,rentongzhang/servo,karlito40/servo,tschneidereit/servo,jdramani/servo,mattnenterprise/servo,wartman4404/servo,larsbergstrom/servo,emilio/servo,mattnenterprise/servo,bjwbell/servo,GyrosOfWar/servo,anthgur/servo,bjwbell/servo,meh/servo,akosel/servo,walac/servo,mattnenterprise/servo,larsbergstrom/servo,anthgur/servo,upsuper/servo,dsandeephegde/servo,szeged/servo,CJ8664/servo,jimberlage/servo,deokjinkim/servo,dati91/servo,cbrewster/servo,youprofit/servo,emilio/servo,jdramani/servo,jlegendary/servo,peterjoel/servo,fiji-flo/servo,ConnorGBrewster/servo,paulrouget/servo,pgonda/servo,dati91/servo,aweinstock314/servo,rnestler/servo,thiagopnts/servo,sadmansk/servo,A-deLuna/servo,meh/servo,caldwell/servo,mt2d2/servo,paulrouget/servo,WriterOfAlicrow/servo,meh/servo,jdramani/servo,nick-thompson/servo,avadacatavra/servo,A-deLuna/servo,tafia/servo,runarberg/servo,pyfisch/servo,samfoo/servo,brendandahl/servo,dsandeephegde/servo,pgonda/servo,nnethercote/servo,cbrewster/servo,WriterOfAlicrow/servo,dhananjay92/servo,dsandeephegde/servo,jimberlage/servo,nnethercote/servo,j3parker/servo,dvberkel/servo,KiChjang/servo,mattnenterprise/servo,rnestler/servo,AnthonyBroadCrawford/servo,pyecs/servo,meh/servo,akosel/servo,saneyuki/servo,GyrosOfWar/servo,nrc/servo,aidanhs/servo,notriddle/servo,KiChjang/servo,nnethercote/servo,avadacatavra/servo,codemac/servo,thiagopnts/servo,larsbergstrom/servo,canaltinova/servo,akosel/servo,WriterOfAlicrow/servo,nrc/servo,pgonda/servo,mbrubeck/servo,peterjoel/servo,sadmansk/servo,deokjinkim/servo,AnthonyBroadCrawford/servo,pyfisch/servo,saneyuki/servo,bjwbell/servo,aweinstock314/servo,upsuper/servo,dati91/servo,szeged/servo,ryancanhelpyou/servo,sadmansk/servo,g-k/servo,tafia/servo,KiChjang/servo,mbrubeck/servo,dhananjay92/servo,dagnir/servo,tempbottle/servo,eddyb/servo,zentner-kyle/servo,saneyuki/servo,brendandahl/servo,anthgur/servo,DominoTree/servo,tempbottle/servo,youprofit/servo,ConnorGBrewster/servo,rentongzhang/servo,huonw/servo,splav/servo,aweinstock314/servo,ryancanhelpyou/servo,emilio/servo,peterjoel/servo,SimonSapin/servo,saratang/servo,nnethercote/servo,kindersung/servo,dati91/servo,codemac/servo,nick-thompson/servo,dati91/servo,samfoo/servo,pyfisch/servo,g-k/servo,aidanhs/servo,meh/servo,KiChjang/servo,akosel/servo,vks/servo,s142857/servo,samfoo/servo,SimonSapin/servo,saneyuki/servo,j3parker/servo,emilio/servo,saratang/servo,pyfisch/servo,nnethercote/servo,deokjinkim/servo,brendandahl/servo,paulrouget/servo,mt2d2/servo,vks/servo,kindersung/servo,splav/servo,A-deLuna/servo,tafia/servo,paulrouget/servo,upsuper/servo,caldwell/servo,avadacatavra/servo,upsuper/servo,pyfisch/servo,rnestler/servo,emilio/servo,DominoTree/servo,boghison/servo,vks/servo,eddyb/servo,mbrubeck/servo,thiagopnts/servo,mdibaiee/servo,s142857/servo,caldwell/servo,nerith/servo,sadmansk/servo,nerith/servo,meh/servo,walac/servo,rentongzhang/servo,huonw/servo,szeged/servo,AnthonyBroadCrawford/servo,rentongzhang/servo,karlito40/servo,j3parker/servo,DominoTree/servo,pgonda/servo,cbrewster/servo,rnestler/servo,SimonSapin/servo,walac/servo,nerith/servo,youprofit/servo,canaltinova/servo,youprofit/servo,steveklabnik/servo,huonw/servo,dvberkel/servo,dsandeephegde/servo,mt2d2/servo,notriddle/servo,jdramani/servo,SimonSapin/servo,nrc/servo,anthgur/servo,deokjinkim/servo,pyecs/servo,tempbottle/servo,avadacatavra/servo,GyrosOfWar/servo,dhananjay92/servo,CJ8664/servo,jlegendary/servo,fiji-flo/servo,pyfisch/servo,RenaudParis/servo,huonw/servo,rnestler/servo,zentner-kyle/servo,tschneidereit/servo,AnthonyBroadCrawford/servo,dhananjay92/servo,notriddle/servo,codemac/servo,DominoTree/servo,steveklabnik/servo,splav/servo,anthgur/servo,CJ8664/servo,GyrosOfWar/servo,CJ8664/servo,wartman4404/servo,nick-thompson/servo,dagnir/servo,splav/servo,pyecs/servo,rentongzhang/servo,mdibaiee/servo,g-k/servo,notriddle/servo,AnthonyBroadCrawford/servo,aweinstock314/servo,KiChjang/servo,ConnorGBrewster/servo,akosel/servo,dsandeephegde/servo,jdramani/servo,runarberg/servo,jimberlage/servo,dsandeephegde/servo,emilio/servo,KiChjang/servo,fiji-flo/servo,larsbergstrom/servo,tempbottle/servo,ConnorGBrewster/servo,codemac/servo,boghison/servo,notriddle/servo,anthgur/servo,canaltinova/servo,dagnir/servo,RenaudParis/servo,SimonSapin/servo,runarberg/servo,dvberkel/servo,dsandeephegde/servo,pgonda/servo,samfoo/servo,ryancanhelpyou/servo,jimberlage/servo,peterjoel/servo,nerith/servo,AnthonyBroadCrawford/servo,steveklabnik/servo,pyecs/servo,zentner-kyle/servo,jlegendary/servo,DominoTree/servo,brendandahl/servo,j3parker/servo,mdibaiee/servo,saneyuki/servo,mdibaiee/servo,notriddle/servo,nrc/servo,s142857/servo,emilio/servo,dvberkel/servo,sadmansk/servo,larsbergstrom/servo,jimberlage/servo,huonw/servo,j3parker/servo,GyrosOfWar/servo,cbrewster/servo,nick-thompson/servo,zentner-kyle/servo,dati91/servo,wartman4404/servo,samfoo/servo,aidanhs/servo,ConnorGBrewster/servo,mbrubeck/servo,dhananjay92/servo,ryancanhelpyou/servo,mdibaiee/servo,aidanhs/servo,zentner-kyle/servo,saratang/servo,karlito40/servo,s142857/servo,kindersung/servo,thiagopnts/servo,aweinstock314/servo,pgonda/servo,anthgur/servo,upsuper/servo,mattnenterprise/servo,bjwbell/servo,sadmansk/servo,boghison/servo,larsbergstrom/servo,larsbergstrom/servo,mattnenterprise/servo,paulrouget/servo,DominoTree/servo,splav/servo,aweinstock314/servo,jimberlage/servo,fiji-flo/servo,WriterOfAlicrow/servo,pyecs/servo,pyecs/servo,GyrosOfWar/servo,splav/servo,mdibaiee/servo,samfoo/servo,A-deLuna/servo,dhananjay92/servo,caldwell/servo,szeged/servo,SimonSapin/servo,eddyb/servo,jlegendary/servo,pyfisch/servo,WriterOfAlicrow/servo,ryancanhelpyou/servo,canaltinova/servo,peterjoel/servo,runarberg/servo,huonw/servo,bjwbell/servo,nrc/servo,tschneidereit/servo,pgonda/servo,rentongzhang/servo,walac/servo,mt2d2/servo,SimonSapin/servo,jlegendary/servo,codemac/servo,bjwbell/servo,steveklabnik/servo,wartman4404/servo,saneyuki/servo,runarberg/servo,fiji-flo/servo,rentongzhang/servo,pyecs/servo,saneyuki/servo,peterjoel/servo,dati91/servo,paulrouget/servo,sadmansk/servo,larsbergstrom/servo,avadacatavra/servo,tschneidereit/servo,RenaudParis/servo,szeged/servo,zentner-kyle/servo,splav/servo,aidanhs/servo,steveklabnik/servo,tafia/servo,thiagopnts/servo,karlito40/servo,aidanhs/servo,kindersung/servo,nick-thompson/servo,bjwbell/servo,rnestler/servo,upsuper/servo,jimberlage/servo,dagnir/servo,avadacatavra/servo,steveklabnik/servo,DominoTree/servo,saratang/servo,saratang/servo,nerith/servo,deokjinkim/servo,walac/servo,RenaudParis/servo,larsbergstrom/servo,KiChjang/servo,ConnorGBrewster/servo,eddyb/servo,jdramani/servo,mdibaiee/servo,szeged/servo,mt2d2/servo,boghison/servo,youprofit/servo,nnethercote/servo,paulrouget/servo,paulrouget/servo,j3parker/servo,cbrewster/servo,CJ8664/servo,dsandeephegde/servo,dagnir/servo,youprofit/servo,deokjinkim/servo,RenaudParis/servo,paulrouget/servo,eddyb/servo,RenaudParis/servo,nnethercote/servo,karlito40/servo,mt2d2/servo,vks/servo,ConnorGBrewster/servo,codemac/servo,splav/servo,brendandahl/servo,WriterOfAlicrow/servo,thiagopnts/servo,dati91/servo,rnestler/servo,CJ8664/servo,mbrubeck/servo,tempbottle/servo,saratang/servo,AnthonyBroadCrawford/servo,A-deLuna/servo,ryancanhelpyou/servo,s142857/servo,fiji-flo/servo,canaltinova/servo,szeged/servo,emilio/servo,g-k/servo,paulrouget/servo,brendandahl/servo,codemac/servo,emilio/servo,KiChjang/servo,upsuper/servo,A-deLuna/servo,g-k/servo,KiChjang/servo,CJ8664/servo,nrc/servo,aidanhs/servo,mt2d2/servo,runarberg/servo,samfoo/servo,szeged/servo,pyfisch/servo,notriddle/servo,tafia/servo,wartman4404/servo,aweinstock314/servo,fiji-flo/servo,jlegendary/servo,dvberkel/servo,akosel/servo,boghison/servo,jlegendary/servo,caldwell/servo,avadacatavra/servo,cbrewster/servo,dvberkel/servo,vks/servo,caldwell/servo,nerith/servo,tschneidereit/servo,s142857/servo,boghison/servo,DominoTree/servo,akosel/servo,eddyb/servo,upsuper/servo,kindersung/servo,tschneidereit/servo,dhananjay92/servo,walac/servo,A-deLuna/servo,wartman4404/servo,ConnorGBrewster/servo,thiagopnts/servo,mbrubeck/servo,emilio/servo,jimberlage/servo,thiagopnts/servo,mattnenterprise/servo,dagnir/servo,mbrubeck/servo,mattnenterprise/servo,avadacatavra/servo,zentner-kyle/servo,sadmansk/servo,DominoTree/servo,tafia/servo,DominoTree/servo,notriddle/servo,vks/servo,tempbottle/servo,tafia/servo,SimonSapin/servo,walac/servo,nick-thompson/servo,splav/servo,huonw/servo,cbrewster/servo,g-k/servo,tschneidereit/servo,eddyb/servo,peterjoel/servo,rnestler/servo,g-k/servo,deokjinkim/servo,nick-thompson/servo,szeged/servo,eddyb/servo,WriterOfAlicrow/servo,peterjoel/servo,vks/servo,saneyuki/servo,KiChjang/servo,wartman4404/servo,nrc/servo,anthgur/servo,ryancanhelpyou/servo,nnethercote/servo,pyfisch/servo,GyrosOfWar/servo,notriddle/servo,boghison/servo,dvberkel/servo,peterjoel/servo,canaltinova/servo,larsbergstrom/servo,j3parker/servo,brendandahl/servo,jdramani/servo,peterjoel/servo,meh/servo,runarberg/servo,fiji-flo/servo,saneyuki/servo,karlito40/servo,saneyuki/servo,caldwell/servo,dagnir/servo,RenaudParis/servo,splav/servo,nerith/servo,pyfisch/servo,notriddle/servo,s142857/servo,nnethercote/servo,canaltinova/servo,mbrubeck/servo,nnethercote/servo,kindersung/servo,youprofit/servo,szeged/servo,canaltinova/servo,cbrewster/servo,saratang/servo,karlito40/servo,CJ8664/servo,kindersung/servo