Auto merge of #58714 - Centril:rollup, r=Centril

Rollup of 5 pull requests

Successful merges:

 - #58370 (Relax some Hash bounds on HashMap<K, V, S> and HashSet<T, S>)
 - #58421 (Relax some Ord bounds on BinaryHeap<T>)
 - #58686 (replace deprecated rustfmt_skip with rustfmt::skip)
 - #58697 (Use ? in some macros)
 - #58704 (Remove some unnecessary 'extern crate')

Failed merges:

r? @ghost

1 files changed, 0 insertions, 12 deletions

diff --git a/src/bootstrap/lib.rs b/src/bootstrap/lib.rs
index 6a93c95c3d9..2dceb30c4ad 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;