don't log an implicit root connection

Author: MichaelGrupp

crates/store/re_data_loader/src/loader_urdf.rs

@@ -290,14 +290,6 @@ fn log_robot(
         timepoint,
         &CoordinateFrame::update_fields().with_frame(urdf_tree.root.name.clone()),
     )?;
-    // TODO: Do we always need to do that?
-    send_archetype(
-        tx,
-        store_id,
-        entity_path.clone(),
-        timepoint,
-        &Transform3D::update_fields().with_child_frame(urdf_tree.root.name.clone()),
-    )?;
 
     walk_tree(
         &urdf_tree,