Update official dataset manifest

DATA_MANIFEST.json

@@ -2,7 +2,7 @@
   "release": "AnchorSplat processed third-party datasets",
   "date": "2026-07-03",
   "layout": "Extract archives into the AnchorSplat repository data/ directory.",
-  "note": "MVImgNet rebuttal numbers use mvimgnet_supergaussian_4x_downsampled_lr. NeRF Synthetic Blender sparse-38 bicubic is included for zero-shot evaluation.",
+  "note": "Official release packages: MVImgNet rebuttal split and NeRF Synthetic Blender sparse-38 bicubic split.",
   "datasets": [
     {
       "name": "mvimgnet_supergaussian_4x_downsampled_lr",
@@ -31,60 +31,6 @@
       ],
       "missing_required_files": {}
     },
-    {
-      "name": "mvimgnet_supergaussian",
-      "description": "MVImgNet processed from SuperGaussian xyz/rgb inputs.",
-      "archive": "mvimgnet_supergaussian.tar.zst",
-      "sha256": "62b444328a898c990bf3a20d8c805a5e46335ae4b6532f54f11f53bb48847c92",
-      "anchor_splat_config": "configs/dataset/mvimgnet_supergaussian.gin",
-      "scene_count": 15,
-      "file_count": 1012,
-      "scenes": [
-        "0__0000f9c2",
-        "0__0500b0aa",
-        "0__0501195d",
-        "0__1a000f9f",
-        "0__1a0060de",
-        "0__1a011df4",
-        "0__30005383",
-        "0__300056f9",
-        "0__3100496e",
-        "0__32007107",
-        "0__32015e62",
-        "0__3400563f",
-        "0__34012851",
-        "0__3a00ca14",
-        "0__3c005f04"
-      ],
-      "missing_required_files": {}
-    },
-    {
-      "name": "mvimgnet_lowres_3dgs",
-      "description": "MVImgNet processed with low-resolution 3DGS inputs.",
-      "archive": "mvimgnet_lowres_3dgs.tar.zst",
-      "sha256": "9dd15a50e3b46156b07dcb220e9f2523c89655fd21ceb6dc8247799fdbdb2958",
-      "anchor_splat_config": "configs/dataset/mvimgnet_lowres_3dgs.gin",
-      "scene_count": 15,
-      "file_count": 1108,
-      "scenes": [
-        "0__0000f9c2",
-        "0__0500b0aa",
-        "0__0501195d",
-        "0__1a000f9f",
-        "0__1a0060de",
-        "0__1a011df4",
-        "0__30005383",
-        "0__300056f9",
-        "0__3100496e",
-        "0__32007107",
-        "0__32015e62",
-        "0__3400563f",
-        "0__34012851",
-        "0__3a00ca14",
-        "0__3c005f04"
-      ],
-      "missing_required_files": {}
-    },
     {
       "name": "nerf_synthetic_sparse38_bicubic",
       "description": "Processed NeRF Synthetic Blender sparse-38 bicubic split with 200-resolution input 3DGS and 800-resolution target views.",