refactor(edition): remove unnecessary 'extern crate'

Author: kurnevsky

src/main.rs

@@ -1,24 +1,9 @@
-extern crate chrono;
 #[macro_use]
 extern crate clap;
-extern crate env_logger;
-extern crate failure;
-extern crate futures;
-extern crate hex;
-extern crate itertools;
 #[macro_use]
 extern crate log;
-extern crate regex;
-#[cfg(unix)]
-extern crate syslog;
-extern crate tokio;
-extern crate tokio_codec;
-extern crate config;
 #[macro_use]
 extern crate serde_derive;
-extern crate serde;
-extern crate serde_yaml;
-extern crate tox;
 
 mod node_config;
 mod motd;