message: Remove unused `default_ns` from `Client`
diff: @@ -43,7 +43,6 @@ use std::convert::{TryFrom, TryInto};
  #[derive(Clone)]
  pub struct Client {
  cluster_url: url::Url,
  - default_ns: String,
  inner: HyperClient<HttpsConnector<HttpConnector>, hyper::Body>,
  headers: HeaderMap,
  // REVIEW Factor out `config::Authentication`.
  @@ -437,7 +436,6 @@ impl TryFrom<Config> for Client {
  /// Convert [`Config`] into a [`Client`]
  fn try_from(config: Config) -> Result<Self> {
  let cluster_url = config.cluster_url.clone();
  - let default_ns = config.default_ns.clone();
  let headers = config.headers.clone();
  let auth_header = config.auth_header.clone();
  let conns: Connectors = config.try_into()?;
  @@ -445,7 +443,6 @@ impl TryFrom<Config> for Client {
  Ok(Self {
  cluster_url,
  - default_ns,
  headers,
  auth_header,
  inner: client,
  