Revert "Add pathfinding for dynamic bodies" (#18397)

Content.Server/NPC/Pathfinding/PathfindingSystem.cs

@@ -45,7 +45,6 @@ namespace Content.Server.NPC.Pathfinding
         [Dependency] private readonly IPlayerManager _playerManager = default!;
         [Dependency] private readonly IRobustRandom _random = default!;
         [Dependency] private readonly DestructibleSystem _destructible = default!;
-        [Dependency] private readonly EntityLookupSystem _lookup = default!;
         [Dependency] private readonly FixtureSystem _fixtures = default!;
         [Dependency] private readonly SharedPhysicsSystem _physics = default!;