Add forgotten `JsonIgnore` rules on interface types
Add forgotten `JsonIgnore` rules on interface types

Just to avoid them getting serialised as part of the "new" .osu
serialisation format.

peppy/osu,smoogipoo/osu,ppy/osu,peppy/osu,NeoAdonis/osu,smoogipoo/osu,NeoAdonis/osu,smoogipooo/osu,ppy/osu,NeoAdonis/osu,peppy/osu,ppy/osu,smoogipoo/osu