Revert "feat(render): Campaign V slice V4c - move the world draw path onto the RHI"

This reverts commit f353fb53f8.

src/AcDream.App/Rendering/Wb/GlobalMeshBuffer.cs

@@ -171,23 +171,6 @@ public sealed class GlobalMeshBuffer : IDisposable
 
     /// <summary>The index store's raw GL name. See <see cref="VBO"/>.</summary>
     public uint IBO => _indexBuffer is null ? 0u : RequireGlBuffer(_indexBuffer).GlName;
-
-    /// <summary>
-    /// The vertex store as the arena actually owns it. Campaign V slice V4c's
-    /// draw paths bind this through <c>IGpuPassEncoder.BindVertexBuffer</c>;
-    /// its layout is already byte-identical to
-    /// <c>GpuVertexLayout.WorldMesh</c> (32-byte stride, locations 0/1/2 at
-    /// offsets 0/12/24 — see <see cref="ConfigureVertexAttributes"/>), so the
-    /// pipeline's own VAO describes the same vertices this arena packs.
-    ///
-    /// <see cref="VBO"/>/<see cref="IBO"/> survive alongside these because
-    /// <c>ParticleRenderer</c> and <c>ObjectMeshManager</c> still bind the raw
-    /// names; that bridge retires with them, not with this slice.
-    /// </summary>
-    internal IGpuBuffer? VertexStore => _vertexBuffer;
-
-    /// <summary>The index store as the arena owns it. See <see cref="VertexStore"/>.</summary>
-    internal IGpuBuffer? IndexStore => _indexBuffer;
     internal long UploadCount { get; private set; }
     internal long UploadedBytes { get; private set; }
     internal long CapacityBytes =>