Remove unused dependencies from the msg crate.

components/msg/Cargo.toml

@@ -10,10 +10,6 @@ path = "lib.rs"
 [dependencies.util]
 path = "../util"
 
-[dependencies.azure]
-git = "https://github.com/servo/rust-azure"
-features = ["plugins"]
-
 [dependencies.layers]
 git = "https://github.com/servo/rust-layers"
 features = ["plugins"]
@@ -26,15 +22,10 @@ path = "../plugins"
 
 [dependencies]
 cssparser = { version = "0.4", features = [ "serde-serialization" ] }
-app_units = {version = "0.1", features = ["plugins"]}
 bitflags = "0.3"
 hyper = { version = "0.7", features = [ "serde-serialization" ] }
 rustc-serialize = "0.3.4"
 euclid = {version = "0.4", features = ["plugins"]}
 serde = "0.6"
 serde_macros = "0.6"
 url = "0.5.2"
-
-[target.x86_64-apple-darwin.dependencies]
-core-foundation = "0.2"
-io-surface = "0.1.0"

components/msg/lib.rs

@@ -5,17 +5,11 @@
 #![feature(custom_attribute, custom_derive, plugin)]
 #![plugin(serde_macros, plugins)]
 
-extern crate app_units;
-extern crate azure;
 #[macro_use]
 extern crate bitflags;
-#[cfg(target_os = "macos")]
-extern crate core_foundation;
 extern crate cssparser;
 extern crate euclid;
 extern crate hyper;
-#[cfg(target_os = "macos")]
-extern crate io_surface;
 extern crate ipc_channel;
 extern crate layers;
 extern crate rustc_serialize;