fix(@angular/build): skip prerendering when no routes are configured

When no routes are specified, prerendering is unnecessary and can lead to unexpected behavior. This change ensures that prerendering is only performed when routes are properly configured.

Author: alan-agius4

packages/angular/ssr/src/routes/ng-routes.ts

@@ -477,8 +477,6 @@ export async function getRoutesFromAngularRouterConfig(
           );
         }
       }
-    } else {
-      routesResults.push({ route: '', renderMode: RenderMode.Prerender });
     }
 
     return {