docs: remove metadata from Synapse React example

Author: hugomrdias

docs/src/content/docs/developer-guides/synapse-react.mdx

@@ -172,7 +172,6 @@ const StorageExample = () => {
             <div key={p.id.toString()}>
               <p>Piece {p.id.toString()}: {p.cid.toString()}</p>
               <p>URL: {p.url}</p>
-              <p>Metadata: {JSON.stringify(p.metadata)}</p>
             </div>
           ))}
         </div>