Drop clippy dependency

It's now easier to use with cargo-clippy

Author: sfackler

Cargo.toml

@@ -40,7 +40,6 @@ uuid = { version = ">= 0.1, < 0.3", optional = true }
 security-framework = { version = "0.1.2", optional = true }
 bit-vec = { version = "0.4", optional = true }
 eui48 = { version = "0.1", optional = true }
-clippy = { version = "0.0.61", optional = true }
 
 [dev-dependencies]
 url = "1.0"

src/lib.rs

@@ -42,8 +42,6 @@
 #![warn(missing_docs)]
 #![allow(unknown_lints, needless_lifetimes)] // for clippy
 #![cfg_attr(all(unix, feature = "nightly"), feature(unix_socket))]
-#![cfg_attr(feature = "clippy", feature(plugin))]
-#![cfg_attr(feature = "clippy", plugin(clippy))]
 
 extern crate bufstream;
 extern crate byteorder;