1 files changed, 2 insertions, 11 deletions
diff --git a/components/script/dom/htmlbuttonelement.rs b/components/script/dom/htmlbuttonelement.rs
index 3e66645e756..a2c40fbc10b 100644
--- a/components/script/dom/htmlbuttonelement.rs
+++ b/components/script/dom/htmlbuttonelement.rs
@@ -6,10 +6,9 @@ use dom::activation::Activatable;
 use dom::attr::Attr;
 use dom::bindings::codegen::Bindings::HTMLButtonElementBinding;
 use dom::bindings::codegen::Bindings::HTMLButtonElementBinding::HTMLButtonElementMethods;
-use dom::bindings::codegen::InheritTypes::{ElementCast, ElementTypeId, EventTargetTypeId};
-use dom::bindings::codegen::InheritTypes::{HTMLButtonElementCast, HTMLButtonElementDerived};
+use dom::bindings::codegen::InheritTypes::{ElementCast, HTMLButtonElementCast};
 use dom::bindings::codegen::InheritTypes::{HTMLElementCast, HTMLElementTypeId};
-use dom::bindings::codegen::InheritTypes::{HTMLFieldSetElementDerived, NodeCast, NodeTypeId};
+use dom::bindings::codegen::InheritTypes::{HTMLFieldSetElementDerived, NodeCast};
 use dom::bindings::js::Root;
 use dom::document::Document;
 use dom::element::{AttributeMutation, Element};
@@ -42,14 +41,6 @@ pub struct HTMLButtonElement {
     button_type: Cell<ButtonType>
 }
 
-impl HTMLButtonElementDerived for EventTarget {
-    fn is_htmlbuttonelement(&self) -> bool {
-        *self.type_id() ==
-            EventTargetTypeId::Node(
-                NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLButtonElement)))
-    }
-}
-
 impl HTMLButtonElement {
     fn new_inherited(localName: DOMString,
                      prefix: Option<DOMString>,