Reduce complexity of AllHitObjects enumerator when nested playfields are not present
Reduce complexity of AllHitObjects enumerator when nested playfields are not present

NeoAdonis/osu,smoogipoo/osu,peppy/osu,peppy/osu,smoogipoo/osu,ppy/osu,smoogipoo/osu,UselessToucan/osu,ppy/osu,NeoAdonis/osu,NeoAdonis/osu,smoogipooo/osu,UselessToucan/osu,ppy/osu,peppy/osu,UselessToucan/osu,peppy/osu-new