Remove unused dependencies (#19490)

Content.Server/NPC/Systems/NPCCombatSystem.cs

@@ -21,7 +21,6 @@ public sealed partial class NPCCombatSystem : EntitySystem
     [Dependency] private readonly SharedAudioSystem _audio = default!;
     [Dependency] private readonly NPCSteeringSystem _steering = default!;
     [Dependency] private readonly SharedMeleeWeaponSystem _melee = default!;
-    [Dependency] private readonly SharedPhysicsSystem _physics = default!;
     [Dependency] private readonly SharedTransformSystem _transform = default!;
 
     /// <summary>