Remove unused IoC dependency references. (#31704)

Remove unused IoC dependencies

Content.Shared/Mobs/Systems/MobStateSystem.cs

@@ -12,7 +12,6 @@ public partial class MobStateSystem : EntitySystem
 {
     [Dependency] private readonly ActionBlockerSystem _blocker = default!;
     [Dependency] private readonly SharedAppearanceSystem _appearance = default!;
-    [Dependency] private readonly SharedPhysicsSystem _physics = default!;
     [Dependency] private readonly StandingStateSystem _standing = default!;
     [Dependency] private readonly ISharedAdminLogManager _adminLogger = default!;
     [Dependency] private readonly ILogManager _logManager = default!;