Standalone dataset card; drop constant column; clarify animated_joints

scripts/build_dataset.py

@@ -17,7 +17,7 @@ XL   = re.compile(r"^([0-9a-f]{24})_(fbx|glb|gltf)\.glb$")
 SKFB = re.compile(r"^([0-9a-f]{32})\.glb$")
 
 ASSET_COLS = ["file", "object_id", "id_family", "source_format", "size_bytes",
-              "num_vertices", "num_meshes", "num_nodes", "num_skins", "num_joints",
+              "num_vertices", "num_meshes", "num_nodes", "num_joints",
               "num_skeleton_roots", "single_tree", "num_animations",
               "total_duration_sec", "max_keyframes", "animated_joints", "generator"]
 CLIP_COLS  = ["file", "object_id", "clip_index", "clip_name", "duration_sec",
@@ -93,7 +93,7 @@ def main():
             "file": "glb/" + f, "object_id": oid, "id_family": fam, "source_format": fmt,
             "size_bytes": os.path.getsize(path),
             "num_vertices": info["num_vertices"], "num_meshes": info["num_meshes"],
-            "num_nodes": info["num_nodes"], "num_skins": info["num_skins"],
+            "num_nodes": info["num_nodes"],
             "num_joints": info["num_joints"], "num_skeleton_roots": info["num_skeleton_roots"],
             "single_tree": str(info["num_skeleton_roots"] == 1).lower(),
             "num_animations": info["num_animations"],