移除未使用的错误响应结构体

services/user-service/user-register/src/main.rs

@@ -34,11 +34,6 @@ struct RegisterResponse {
     message: String,
 }
 
-#[derive(Serialize)]
-struct ErrorResponse {
-    error: String,
-}
-
 #[tokio::main]
 async fn main() {
     tracing_subscriber::fmt::init();