tests: Fix warning in unit tests

tests/unit/net/http_loader.rs

@@ -19,12 +19,11 @@ use hyper::status::StatusCode;
 use msg::constellation_msg::PipelineId;
 use net::cookie::Cookie;
 use net::cookie_storage::CookieStorage;
-use net::hsts::{HSTSList, HSTSEntry};
+use net::hsts::HSTSEntry;
 use net::http_loader::{load, LoadError, HttpRequestFactory, HttpRequest, HttpResponse, HttpState};
 use net::resource_thread::{AuthCacheEntry, CancellationListener};
 use net_traits::{LoadData, CookieSource, LoadContext, IncludeSubdomains};
 use std::borrow::Cow;
-use std::collections::HashMap;
 use std::io::{self, Write, Read, Cursor};
 use std::sync::mpsc::Receiver;
 use std::sync::{Arc, mpsc, RwLock};

tests/unit/util/lib.rs

@@ -2,7 +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/. */
 
-#![cfg_attr(test, feature(plugin, custom_derive, heap_api))]
+#![cfg_attr(test, feature(plugin, custom_derive))]
 #![cfg_attr(test, plugin(plugins))]
 #![feature(alloc)]