Clean up BeatmapsetDeleteTest
Clean up BeatmapsetDeleteTest

ppy/osu-web,notbakaneko/osu-web,ppy/osu-web,notbakaneko/osu-web,ppy/osu-web,ppy/osu-web,ppy/osu-web,notbakaneko/osu-web,notbakaneko/osu-web,notbakaneko/osu-web