Remove obsolete cached covers when albums removed
Remove obsolete cached covers when albums removed

owncloud/music,owncloud/music,paulijar/music,Faldon/music,paulijar/music,paulijar/music,Faldon/music,Faldon/music,paulijar/music,owncloud/music,paulijar/music,owncloud/music,Faldon/music,Faldon/music,owncloud/music