Attempt to fix flaky tests by removing finaliser

osu.Game/Tests/Visual/OsuTestScene.cs

@@ -341,8 +341,6 @@ namespace osu.Game.Tests.Visual
         {
             private readonly Track track;
 
-            private readonly TrackVirtualStore store;
-
             /// <summary>
             /// Create an instance which creates a <see cref="TestBeatmap"/> for the provided ruleset when requested.
             /// </summary>
@@ -372,7 +370,7 @@ namespace osu.Game.Tests.Visual
 
                 if (referenceClock != null)
                 {
-                    store = new TrackVirtualStore(referenceClock);
+                    var store = new TrackVirtualStore(referenceClock);
                     audio.AddItem(store);
                     track = store.GetVirtual(trackLength);
                 }
@@ -385,12 +383,6 @@ namespace osu.Game.Tests.Visual
                 LoadTrack();
             }
 
-            ~ClockBackedTestWorkingBeatmap()
-            {
-                // Remove the track store from the audio manager
-                store?.Dispose();
-            }
-
             protected override Track GetBeatmapTrack() => track;
 
             public override bool TryTransferTrack(WorkingBeatmap target)