Remove most usages of extern crate. (#324)

Author: waywardmonkeys

benches/bench.rs

@@ -1,12 +1,10 @@
 #![feature(test)]
 #![allow(deprecated)]
 
-#[macro_use]
-extern crate smallvec;
 extern crate test;
 
-use self::test::Bencher;
-use smallvec::SmallVec;
+use smallvec::{smallvec, SmallVec};
+use test::Bencher;
 
 const VEC_SIZE: usize = 16;
 const SPILLED_SIZE: usize = 100;

fuzz/fuzz_targets/smallvec_ops.rs

@@ -177,26 +177,20 @@ fn do_test_all(data: &[u8]) {
     do_test::<8>(data);
 }
 
-#[cfg(feature = "afl")]
-#[macro_use]
-extern crate afl;
 #[cfg(feature = "afl")]
 fn main() {
-    fuzz!(|data| {
+    afl::fuzz!(|data| {
         // Remove the panic hook so we can actually catch panic
         // See https://github.com/rust-fuzz/afl.rs/issues/150
         std::panic::set_hook(Box::new(|_| {}));
         do_test_all(data);
     });
 }
 
-#[cfg(feature = "honggfuzz")]
-#[macro_use]
-extern crate honggfuzz;
 #[cfg(feature = "honggfuzz")]
 fn main() {
     loop {
-        fuzz!(|data| {
+        honggfuzz::fuzz!(|data| {
             // Remove the panic hook so we can actually catch panic
             // See https://github.com/rust-fuzz/afl.rs/issues/150
             std::panic::set_hook(Box::new(|_| {}));

src/tests.rs

@@ -853,13 +853,10 @@ fn test_write() {
     assert_eq!(small_vec.as_ref(), data.as_ref());
 }
 
-#[cfg(feature = "serde")]
-extern crate bincode;
-
 #[cfg(feature = "serde")]
 #[test]
 fn test_serde() {
-    use self::bincode::{config, deserialize};
+    use bincode::{config, deserialize};
     let mut small_vec: SmallVec<i32, 2> = SmallVec::new();
     small_vec.push(1);
     let encoded = config().limit(100).serialize(&small_vec).unwrap();