message: clippy's right
diff: @@ -351,7 +351,7 @@ impl Manifest {
  }
  }
  - fn warn_on_account_info(&self) -> () {
  + fn warn_on_account_info(&self) {
  let account_id_env = env::var("CF_ACCOUNT_ID").is_ok();
  let zone_id_env = env::var("CF_ZONE_ID").is_ok();
  let mut top_level_fields: Vec<String> = Vec::new();
  