Remove redundant native scan event

Summary: It didnt need to exist and can be seen as a subtree update of type full scan

Reviewed By: lblasa

Differential Revision: D39731552

fbshipit-source-id: e351413d9480e118fc000c5e55eae0e7980233f2

desktop/plugins/public/ui-debugger/index.tsx

@@ -35,11 +35,6 @@ export function plugin(client: PluginClient<Events>) {
     });
   });
 
-  client.onMessage('nativeScan', ({nodes}) => {
-    //Native scan is a full update so overwrite everything
-    nodesAtom.set(new Map(nodes.map((node) => [node.id, node])));
-  });
-
   return {rootId, snapshots: snapshotsAtom, nodes: nodesAtom, perfEvents};
 }