message: Clean up derives
diff: @@ -367,7 +367,7 @@ impl Token {
  }
  /// Simple client credentials object for Spotify.
  -#[derive(Debug, Default, Clone, Serialize, Deserialize)]
  +#[derive(Debug, Clone)]
  pub struct Credentials {
  pub id: String,
  pub secret: String,
  @@ -399,7 +399,7 @@ impl Credentials {
  }
  /// Structure that holds the required information for requests with OAuth.
  -#[derive(Debug, Clone, Serialize, Deserialize)]
  +#[derive(Debug, Clone)]
  pub struct OAuth {
  pub redirect_uri: String,
  /// The state is generated by default, as suggested by the OAuth2 spec:
  