message: Small clean-up.
diff: @@ -161,13 +161,7 @@ pub mod open_command {
  update_json_map_opt_key!(json, "rekey", rekey);
  json.insert("rekey_derivation_method".to_string(), serde_json::Value::String(map_key_derivation_method(rekey_derivation_method)?.to_string()));
  - match storage_credentials {
  - Some(creds) => {
  - json.insert("storage_credentials".to_string(), creds);
  - ()
  - },
  - _ => ()
  - }
  + storage_credentials.map(|creds| json.insert("storage_credentials".to_string(), creds));
  JSONValue::from(json).to_string()
  };
  