Update model.rs

examples/starwars/model.rs

@@ -87,9 +87,6 @@ impl Droid {
 
 pub struct QueryRoot;
 
-#[async_graphql::Union]
-struct HumanDroid(Human, Droid);
-
 #[async_graphql::Object]
 impl QueryRoot {
     #[field]
@@ -108,11 +105,6 @@ impl QueryRoot {
         }
     }
 
-    #[field]
-    async fn test(&self, ctx: &Context<'_>) -> HumanDroid {
-        Human(ctx.data::<StarWars>().luke).into()
-    }
-
     #[field]
     async fn human(
         &self,