revert(app): drop foundry-statue camera target — it's a weenie

The Holtburg foundry statue is a selectable in-game item (weenie
template spawned by the server), not a static client-dat entity. It's
correctly absent from:
- LandBlockInfo.Objects (Stabs)
- LandBlockInfo.Buildings (BuildingInfo)
- EnvCell.StaticObjects
- Region.SceneInfo procedural scenery (SceneryGenerator explicitly
  skips ObjectDesc entries where WeenieObj != 0 — that branch is the
  weenie-reference flag)

The client is behaving correctly. The statue will appear once we
connect to a live ACEmulator instance and receive CreateObject network
messages placing the weenie at its spawn position — Phase 4+ work.
Setup 0x02000081 that I speculatively identified as "the statue" is a
different decoration entirely; there's no need to pin the default
camera at its location.

Revert the camera targeting from eb27e3c. OrbitCamera defaults back to
(96, 96, 0) centered on Holtburg, FlyCamera to (96, 96, 150).

src/AcDream.App/Rendering/GameWindow.cs

@@ -413,17 +413,6 @@ public sealed class GameWindow : IDisposable
         }
         Console.WriteLine($"interior: spawned {interiorSpawned} static objects from EnvCells");
 
-        // Point the default camera at the Holtburg foundry rooftop so the user
-        // can see Setup 0x02000081 (the presumed statue) without having to hunt
-        // for it. Foundry is Building[7] at (107.5, 36.0, 94) and we render a
-        // candidate statue Setup at (107.5, 36.0, 100.85) from EnvCell 0xA9B40166.
-        _cameraController!.Orbit.Target = new System.Numerics.Vector3(107.5f, 36.0f, 100.85f);
-        _cameraController.Orbit.Distance = 60f;
-        _cameraController.Fly.Position = new System.Numerics.Vector3(107.5f, 0f, 115f);
-        _cameraController.Fly.Yaw = MathF.PI / 2f;
-        _cameraController.Fly.Pitch = -0.15f;
-        Console.WriteLine("camera targeted at suspected foundry statue at (107.5, 36.0, 100.85)");
-
         _entities = hydratedEntities;
         Console.WriteLine($"hydrated {_entities.Count} entities total (stabs + buildings + scenery + interior)");
     }