From 9a0b4b6705469e356a03fb7ea9522636492957c4 Mon Sep 17 00:00:00 2001
From: Taiki Endo <te316e89@gmail.com>
Date: Mon, 25 Feb 2019 00:40:34 +0900
Subject: [PATCH] Remove some unnecessary 'extern crate'

---
 src/bootstrap/bin/main.rs            |  2 --
 src/bootstrap/bin/rustc.rs           |  2 --
 src/bootstrap/bin/rustdoc.rs         |  2 --
 src/bootstrap/bin/sccache-plus-cl.rs |  2 --
 src/bootstrap/lib.rs                 | 12 ------------
 src/liballoc/benches/lib.rs          |  2 --
 src/liballoc/tests/lib.rs            |  3 ---
 7 files changed, 25 deletions(-)

diff --git a/src/bootstrap/bin/main.rs b/src/bootstrap/bin/main.rs
index 8ddce5c247db6..0732cb83f39c6 100644
--- a/src/bootstrap/bin/main.rs
+++ b/src/bootstrap/bin/main.rs
@@ -7,8 +7,6 @@
 
 #![deny(warnings)]
 
-extern crate bootstrap;
-
 use std::env;
 
 use bootstrap::{Config, Build};
diff --git a/src/bootstrap/bin/rustc.rs b/src/bootstrap/bin/rustc.rs
index 7a765973e20f8..b6afe317a07b0 100644
--- a/src/bootstrap/bin/rustc.rs
+++ b/src/bootstrap/bin/rustc.rs
@@ -17,8 +17,6 @@
 
 #![deny(warnings)]
 
-extern crate bootstrap;
-
 use std::env;
 use std::ffi::OsString;
 use std::io;
diff --git a/src/bootstrap/bin/rustdoc.rs b/src/bootstrap/bin/rustdoc.rs
index aeb15821b0bb7..36beec3a944a0 100644
--- a/src/bootstrap/bin/rustdoc.rs
+++ b/src/bootstrap/bin/rustdoc.rs
@@ -4,8 +4,6 @@
 
 #![deny(warnings)]
 
-extern crate bootstrap;
-
 use std::env;
 use std::process::Command;
 use std::path::PathBuf;
diff --git a/src/bootstrap/bin/sccache-plus-cl.rs b/src/bootstrap/bin/sccache-plus-cl.rs
index f9e14d1ff6d30..f40eec83ddf32 100644
--- a/src/bootstrap/bin/sccache-plus-cl.rs
+++ b/src/bootstrap/bin/sccache-plus-cl.rs
@@ -1,5 +1,3 @@
-extern crate cc;
-
 use std::env;
 use std::process::{self, Command};
 
diff --git a/src/bootstrap/lib.rs b/src/bootstrap/lib.rs
index 6a93c95c3d97f..2dceb30c4ad7d 100644
--- a/src/bootstrap/lib.rs
+++ b/src/bootstrap/lib.rs
@@ -114,23 +114,11 @@ extern crate build_helper;
 extern crate serde_derive;
 #[macro_use]
 extern crate lazy_static;
-extern crate serde_json;
-extern crate cmake;
-extern crate filetime;
-extern crate cc;
-extern crate getopts;
-extern crate num_cpus;
-extern crate toml;
-extern crate time;
-extern crate petgraph;
 
 #[cfg(test)]
 #[macro_use]
 extern crate pretty_assertions;
 
-#[cfg(unix)]
-extern crate libc;
-
 use std::cell::{RefCell, Cell};
 use std::collections::{HashSet, HashMap};
 use std::env;
diff --git a/src/liballoc/benches/lib.rs b/src/liballoc/benches/lib.rs
index a1884b7d54852..4bf5ec10c41e7 100644
--- a/src/liballoc/benches/lib.rs
+++ b/src/liballoc/benches/lib.rs
@@ -1,8 +1,6 @@
 #![feature(repr_simd)]
 #![feature(test)]
 
-extern crate rand;
-extern crate rand_xorshift;
 extern crate test;
 
 mod btree;
diff --git a/src/liballoc/tests/lib.rs b/src/liballoc/tests/lib.rs
index 2361a7db1f7a7..90921b6af9f34 100644
--- a/src/liballoc/tests/lib.rs
+++ b/src/liballoc/tests/lib.rs
@@ -8,9 +8,6 @@
 #![feature(unboxed_closures)]
 #![feature(vecdeque_rotate)]
 
-extern crate core;
-extern crate rand;
-
 use std::hash::{Hash, Hasher};
 use std::collections::hash_map::DefaultHasher;