message: Clean up import
diff: @@ -625,9 +625,8 @@ mod tests {
  use std::fmt::{Debug, Display};
  use std::str::FromStr;
  - use http_types::convert::Deserialize;
  use serde::de::DeserializeOwned;
  - use serde::Serialize;
  + use serde::{Deserialize, Serialize};
  use serde_json::json;
  use super::*;
  