message: [libra_swarm] retire mint key option
  libra_swarm is intentionally designed to easily run cluster locally
  It handles implicitly all config management
  That option is not used now anyway. We should retire it to reduce confusion
diff: @@ -21,10 +21,6 @@ struct Args {
  /// Start client
  #[structopt(short = "s", long = "start_client")]
  pub start_client: bool,
  - /// Path to the generated keypair for faucet account. Generated by generate_keypair.
  - /// If not passed, a new keypair will be generated for you and placed in a temp directory
  - #[structopt(short = "m", long = "faucet_key_file_path")]
  - pub faucet_key_file_path: Option<String>,
  }
  fn main() {
  @@ -32,7 +28,7 @@ fn main() {
  let num_nodes = args.num_nodes.unwrap_or(1);
  let (faucet_account_keypair, faucet_key_file_path, _temp_dir) =
  - generate_keypair::load_faucet_key_or_create_default(args.faucet_key_file_path);
  + generate_keypair::load_faucet_key_or_create_default(None);
  println!("Faucet account created in file {:?}", faucet_key_file_path);
  