Remove suggested mimetype
Remove suggested mimetype

We do proper file inspection for everything, including ffprobe, so we
don't need to care about the user-supplied mimetype

nerdzeu/NERDZCrush,MediaCrush/MediaCrush,roderickm/MediaCrush,nerdzeu/NERDZCrush,nerdzeu/NERDZCrush,MediaCrush/MediaCrush,roderickm/MediaCrush,roderickm/MediaCrush