Remove all Assigned Values that are Never Used (#30110)

Remove all Assigned Values that are never used

Content.Shared/Ninja/Systems/DashAbilitySystem.cs

@@ -18,7 +18,6 @@ public sealed class DashAbilitySystem : EntitySystem
 {
     [Dependency] private readonly ActionContainerSystem _actionContainer = default!;
     [Dependency] private readonly IGameTiming _timing = default!;
-    [Dependency] private readonly SharedAudioSystem _audio = default!;
     [Dependency] private readonly SharedChargesSystem _charges = default!;
     [Dependency] private readonly SharedHandsSystem _hands = default!;
     [Dependency] private readonly ExamineSystemShared _examine = default!;