message: Do not validate of RUST_LOG twice
  Another one is in `env_logger::init()`
diff: @@ -13,8 +13,8 @@ const CACHE_TTL_SECONDS: u64 = 3600; // 1 hour
  fn main() {
  // If RUST_LOG is present use that, else default to info level printing.
  - if env::var("RUST_LOG").is_ok() {
  - env_logger::init();
  + if let Some(v) = env::var("RUST_LOG") {
  + env_logger::init_from_env(v);
  } else {
  env_logger::builder()
  .filter_level(log::LevelFilter::Info)
  