Fix some "unused" warnings

Cargo.lock

@@ -1456,9 +1456,7 @@ dependencies = [
 name = "layout_tests"
 version = "0.0.1"
 dependencies = [
- "atomic_refcell 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "layout 0.0.1",
- "script_layout_interface 0.0.1",
  "size_of_test 0.0.1",
 ]
 

components/selectors/matching.rs

@@ -519,17 +519,6 @@ fn matches_simple_selector<E, F>(
     where E: Element,
           F: FnMut(&E, ElementSelectorFlags),
 {
-    macro_rules! relation_if {
-        ($ex:expr, $flag:ident) => {
-            if $ex {
-                context.relations |= $flag;
-                true
-            } else {
-                false
-            }
-        }
-    }
-
     match *selector {
         Component::Combinator(_) => unreachable!(),
         Component::PseudoElement(ref pseudo) => {

tests/unit/layout/Cargo.toml

@@ -10,7 +10,5 @@ path = "lib.rs"
 doctest = false
 
 [dependencies]
-atomic_refcell = "0.1"
 layout = {path = "../../../components/layout"}
-script_layout_interface = {path = "../../../components/script_layout_interface"}
 size_of_test = {path = "../../../components/size_of_test"}

tests/unit/layout/lib.rs

@@ -2,9 +2,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-extern crate atomic_refcell;
 extern crate layout;
-extern crate script_layout_interface;
 #[macro_use] extern crate size_of_test;
 
 #[cfg(all(test, target_pointer_width = "64"))] mod size_of;

tests/unit/net/lib.rs

@@ -34,7 +34,7 @@ extern crate url;
 
 use devtools_traits::DevtoolsControlMsg;
 use hyper::server::{Handler, Listening, Server};
-use net::connector::{create_http_connector, create_ssl_client};
+use net::connector::create_ssl_client;
 use net::fetch::cors_cache::CorsCache;
 use net::fetch::methods::{self, FetchContext};
 use net::filemanager_thread::FileManager;