fix: avoid rendering empty response schemas (#9667)

Refs #9666
Co-authored-by: Pierre Paysant-Le Roux <ppaysant@gmail.com>

src/core/components/model-example.jsx

@@ -19,7 +19,7 @@ export default class ModelExample extends React.Component {
 
   constructor(props, context) {
     super(props, context)
-    let { getConfigs, isExecute } = this.props
+    let { getConfigs, isExecute, schema } = this.props
     let { defaultModelRendering } = getConfigs()
 
     let activeTab = defaultModelRendering
@@ -28,6 +28,10 @@ export default class ModelExample extends React.Component {
       activeTab = "example"
     }
 
+    if (!schema) {
+      activeTab = "example"
+    }
+
     if(isExecute) {
       activeTab = "example"
     }