Revert "Sometimes the extract art test failed because the file type of the extracted image might be PNG or JPG. Belongs to #1328."
Revert "Sometimes the extract art test failed because the file type of the extracted image might be PNG or JPG. Belongs to #1328."

This reverts commit c91e8cb782412c4af760bff6eb9084476eeb9d59.

xsteadfastx/beets,artemutin/beets,m-urban/beets,gabrielaraujof/beets,sampsyo/beets,SusannaMaria/beets,LordSputnik/beets,kareemallen/beets,diego-plan9/beets,drm00/beets,marcuskrahl/beets,sampsyo/beets,kelvinhammond/beets,LordSputnik/beets,YetAnotherNerd/beets,beetbox/beets,shamangeorge/beets,asteven/beets,mried/beets,shanemikel/beets,ttsda/beets,Andypsamp/CODjunit,artemutin/beets,multikatt/beets,jackwilsdon/beets,ruippeixotog/beets,dfc/beets,mathstuf/beets,madmouser1/beets,untitaker/beets,marcuskrahl/beets,mried/beets,MyTunesFreeMusic/privacy-policy,mathstuf/beets,PierreRust/beets,pkess/beets,arabenjamin/beets,kelvinhammond/beets,asteven/beets,sadatay/beets,Dishwishy/beets,jcoady9/beets,moodboom/beets,asteven/beets,mosesfistos1/beetbox,madmouser1/beets,mosesfistos1/beetbox,untitaker/beets,marcuskrahl/beets,lightwang1/beets,mosesfistos1/beetbox,artemutin/beets,tima/beets,arabenjamin/beets,sampsyo/beets,shamangeorge/beets,mosesfistos1/beetbox,PierreRust/beets,Dishwishy/beets,randybias/beets,Andypsamp/CODjunit,ruippeixotog/beets,jcoady9/beets,Freso/beets,Dishwishy/beets,jackwilsdon/beets,Kraymer/beets,gabrielaraujof/beets,ibmibmibm/beets,lightwang1/beets,xsteadfastx/beets,jmwatte/beets,ttsda/beets,sadatay/beets,mathstuf/beets,untitaker/beets,sampsyo/beets,arabenjamin/beets,imsparsh/beets,lengtche/beets,pkess/beets,Dishwishy/beets,YetAnotherNerd/beets,tima/beets,sadatay/beets,swt30/beets,ttsda/beets,randybias/beets,lengtche/beets,kareemallen/beets,drm00/beets,madmouser1/beets,ibmibmibm/beets,mathstuf/beets,gabrielaraujof/beets,Andypsamp/CODfinalJUNIT,jcoady9/beets,drm00/beets,jcoady9/beets,Kraymer/beets,Andypsamp/CODfinalJUNIT,lengtche/beets,Freso/beets,Andypsamp/CODjunit,SusannaMaria/beets,m-urban/beets,marcuskrahl/beets,shanemikel/beets,tima/beets,parapente/beets,Kraymer/beets,diego-plan9/beets,Freso/beets,beetbox/beets,PierreRust/beets,swt30/beets,parapente/beets,randybias/beets,ttsda/beets,dfc/beets,jackwilsdon/beets,imsparsh/beets,xsteadfastx/beets,drm00/beets,ruippeixotog/beets,randybias/beets,dfc/beets,SusannaMaria/beets,imsparsh/beets,MyTunesFreeMusic/privacy-policy,kareemallen/beets,Andypsamp/CODjunit,ibmibmibm/beets,pkess/beets,MyTunesFreeMusic/privacy-policy,imsparsh/beets,jmwatte/beets,LordSputnik/beets,MyTunesFreeMusic/privacy-policy,Andypsamp/CODfinalJUNIT,lengtche/beets,dfc/beets,kelvinhammond/beets,shanemikel/beets,Freso/beets,untitaker/beets,diego-plan9/beets,kelvinhammond/beets,lightwang1/beets,Andypsamp/CODfinalJUNIT,lightwang1/beets,kareemallen/beets,beetbox/beets,madmouser1/beets,mried/beets,parapente/beets,PierreRust/beets,m-urban/beets,jmwatte/beets,jackwilsdon/beets,jmwatte/beets,diego-plan9/beets,tima/beets,moodboom/beets,shanemikel/beets,gabrielaraujof/beets,pkess/beets,YetAnotherNerd/beets,xsteadfastx/beets,YetAnotherNerd/beets,swt30/beets,swt30/beets,shamangeorge/beets,Andypsamp/CODfinalJUNIT,SusannaMaria/beets,asteven/beets,moodboom/beets,artemutin/beets,ruippeixotog/beets,multikatt/beets,ibmibmibm/beets,multikatt/beets,m-urban/beets,arabenjamin/beets,beetbox/beets,moodboom/beets,sadatay/beets,Kraymer/beets,LordSputnik/beets,shamangeorge/beets,Andypsamp/CODjunit,mried/beets,multikatt/beets,parapente/beets