Update fulldeps tests and clippy

src/librustc_serialize/json.rs

@@ -68,7 +68,6 @@
 //!
 //! ```rust
 //! # #![feature(rustc_private)]
-//! extern crate serialize as rustc_serialize; // for the deriving below
 //! use rustc_serialize::json;
 //!
 //! // Automatically generate `Decodable` and `Encodable` trait implementations
@@ -103,7 +102,6 @@
 //!
 //! ```rust
 //! # #![feature(rustc_private)]
-//! extern crate serialize as rustc_serialize;
 //! use rustc_serialize::json::{self, ToJson, Json};
 //!
 //! // A custom data structure
@@ -143,7 +141,6 @@
 //!
 //! ```rust
 //! # #![feature(rustc_private)]
-//! extern crate serialize as rustc_serialize;
 //! use std::collections::BTreeMap;
 //! use rustc_serialize::json::{self, Json, ToJson};
 //!

src/librustc_serialize/tests/json.rs

@@ -1,7 +1,5 @@
 #![allow(rustc::internal)]
 
-extern crate serialize as rustc_serialize;
-
 use json::DecoderError::*;
 use json::ErrorCode::*;
 use json::Json::*;

src/librustc_serialize/tests/leb128.rs

@@ -1,4 +1,3 @@
-extern crate serialize as rustc_serialize;
 use rustc_serialize::leb128::*;
 
 macro_rules! impl_test_unsigned_leb128 {

src/librustc_serialize/tests/opaque.rs

@@ -1,7 +1,5 @@
 #![allow(rustc::internal)]
 
-extern crate serialize as rustc_serialize;
-
 use rustc_serialize::opaque::{Decoder, Encoder};
 use rustc_serialize::{Decodable, Encodable};
 use std::fmt::Debug;