diff --git a/components/script/dom/bindings/js.rs b/components/script/dom/bindings/js.rs
index e7f790fb1ab..b798d6c1e27 100644
--- a/components/script/dom/bindings/js.rs
+++ b/components/script/dom/bindings/js.rs
@@ -715,25 +715,3 @@ impl<'a, T: Reflectable> Reflectable for JSRef<'a, T> {
         (**self).reflector()
     }
 }
-
-/// A trait for comparing smart pointers ignoring the lifetimes
-pub trait Comparable<T> {
-    /// Returns whether the other value points to the same object.
-    fn equals(&self, other: T) -> bool;
-}
-
-impl<'a, 'b, T> Comparable<JSRef<'a, T>> for JSRef<'b, T> {
-    fn equals(&self, other: JSRef<'a, T>) -> bool {
-        self.ptr == other.ptr
-    }
-}
-
-impl<'a, 'b, T> Comparable<Option<JSRef<'a, T>>> for Option<JSRef<'b, T>> {
-    fn equals(&self, other: Option<JSRef<'a, T>>) -> bool {
-        match (*self, other) {
-            (Some(x), Some(y)) => x.ptr == y.ptr,
-            (None, None) => true,
-            _ => false
-        }
-    }
-}
diff --git a/components/script/dom/htmlinputelement.rs b/components/script/dom/htmlinputelement.rs
index 85775dbae0e..e72d13295ec 100644
--- a/components/script/dom/htmlinputelement.rs
+++ b/components/script/dom/htmlinputelement.rs
@@ -15,7 +15,7 @@ use dom::bindings::codegen::InheritTypes::{ElementCast, HTMLElementCast, HTMLInp
 use dom::bindings::codegen::InheritTypes::{HTMLInputElementDerived, HTMLFieldSetElementDerived, EventTargetCast};
 use dom::bindings::codegen::InheritTypes::KeyboardEventCast;
 use dom::bindings::global::GlobalRef;
-use dom::bindings::js::{Comparable, JS, JSRef, LayoutJS, MutNullableHeap};
+use dom::bindings::js::{JS, JSRef, LayoutJS, MutNullableHeap};
 use dom::bindings::js::{OptionalRootable, ResultRootable, Root, Rootable};
 use dom::bindings::js::{RootedReference, Temporary};
 use dom::document::{Document, DocumentHelpers};
@@ -371,7 +371,7 @@ fn in_same_group<'a,'b>(other: JSRef<'a, HTMLInputElement>,
     let other_owner = other_owner.r();
     other.input_type.get() == InputType::InputRadio &&
     // TODO Both a and b are in the same home subtree.
-    other_owner.equals(owner) &&
+    other_owner == owner &&
     // TODO should be a unicode compatibility caseless match
     match (other.get_radio_group_name(), group) {
         (Some(ref s1), Some(s2)) => &**s1 == s2,