Fix unused import lints

Author: brson

src/rustup-cli/main.rs

@@ -1,15 +1,12 @@
 #![recursion_limit = "1024"]
 
 extern crate rustup_dist;
-#[macro_use]
 extern crate rustup_utils;
 #[macro_use]
 extern crate error_chain;
 
-#[macro_use]
 extern crate clap;
 extern crate regex;
-#[macro_use]
 extern crate rustup;
 extern crate term;
 extern crate itertools;

src/rustup-dist/src/lib.rs

@@ -8,7 +8,6 @@ extern crate toml;
 extern crate flate2;
 extern crate tar;
 extern crate url;
-#[macro_use]
 extern crate rustup_utils;
 #[macro_use]
 extern crate error_chain;

src/rustup-utils/src/raw.rs

@@ -9,8 +9,6 @@ use std::io;
 use std::path::Path;
 use std::process::{Command, Stdio, ExitStatus};
 use std::str;
-use std::thread;
-use std::time::Duration;
 
 use rand::random;
 

src/rustup/lib.rs

@@ -1,7 +1,6 @@
 #![recursion_limit = "1024"]
 
 extern crate rustup_dist;
-#[macro_use]
 extern crate rustup_utils;
 #[macro_use]
 extern crate error_chain;