Unused dependency cleanup. (#36760)

* take 2! fight!!!

* final touches

* reeeeeee

Content.Server/Explosion/EntitySystems/ExplosionSystem.cs

@@ -2,7 +2,6 @@ using System.Linq;
 using System.Numerics;
 using Content.Server.Administration.Logs;
 using Content.Server.Atmos.Components;
-using Content.Server.Chat.Managers;
 using Content.Server.NodeContainer.EntitySystems;
 using Content.Server.NPC.Pathfinding;
 using Content.Shared.Camera;
@@ -46,7 +45,6 @@ public sealed partial class ExplosionSystem : SharedExplosionSystem
     [Dependency] private readonly PathfindingSystem _pathfindingSystem = default!;
     [Dependency] private readonly SharedCameraRecoilSystem _recoilSystem = default!;
     [Dependency] private readonly IAdminLogManager _adminLogger = default!;
-    [Dependency] private readonly IChatManager _chat = default!;
     [Dependency] private readonly ThrowingSystem _throwingSystem = default!;
     [Dependency] private readonly PvsOverrideSystem _pvsSys = default!;
     [Dependency] private readonly SharedAudioSystem _audio = default!;