Auto merge of #7401 - nox:rm-helpers, r=Manishearth

Remove helper traits

Now that `JSRef<T>` is gone, there is no need to have helper traits.

<!-- Reviewable:start -->
[<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/servo/servo/7401)
<!-- Reviewable:end -->

1 files changed, 2 insertions, 3 deletions

diff --git a/components/script/dom/worker.rs b/components/script/dom/worker.rs
index c6226021afe..5231a4a0474 100644
--- a/components/script/dom/worker.rs
+++ b/components/script/dom/worker.rs
@@ -16,10 +16,9 @@ use dom::bindings::trace::JSTraceable;
 use dom::bindings::utils::{Reflectable, reflect_dom_object};
 use dom::dedicatedworkerglobalscope::{DedicatedWorkerGlobalScope, WorkerScriptMsg};
 use dom::errorevent::ErrorEvent;
-use dom::event::{Event, EventBubbles, EventCancelable, EventHelpers};
-use dom::eventtarget::{EventTarget, EventTargetHelpers, EventTargetTypeId};
+use dom::event::{Event, EventBubbles, EventCancelable};
+use dom::eventtarget::{EventTarget, EventTargetTypeId};
 use dom::messageevent::MessageEvent;
-use dom::window::WindowHelpers;
 use dom::workerglobalscope::WorkerGlobalScopeInit;
 
 use devtools_traits::{DevtoolsPageInfo, ScriptToDevtoolsControlMsg};