Small improvements to QueryVisualization component (#25422)

frontend/src/metabase/query_builder/components/QueryVisualization.jsx

@@ -81,11 +81,10 @@ export default class QueryVisualization extends Component {
         )}
         <div
           className={cx("spread Visualization z1", {
-            "Visualization--errors": result && result.error,
             "Visualization--loading": isRunning,
           })}
         >
-          {result && result.error ? (
+          {result?.error ? (
             <VisualizationError
               className="spread"
               error={result.error}
@@ -93,7 +92,7 @@ export default class QueryVisualization extends Component {
               card={question.card()}
               duration={result.duration}
             />
-          ) : result && result.data ? (
+          ) : result?.data ? (
             <VisualizationResult
               {...this.props}
               className="spread"