1 files changed, 0 insertions, 12 deletions
diff --git a/src/components/script/dom/bindings/trace.rs b/src/components/script/dom/bindings/trace.rs
index 1c3655bbde3..8cbf32e0cbd 100644
--- a/src/components/script/dom/bindings/trace.rs
+++ b/src/components/script/dom/bindings/trace.rs
@@ -104,12 +104,6 @@ impl<T> Deref<T> for Untraceable<T> {
     }
 }
 
-impl<T> DerefMut<T> for Untraceable<T> {
-    fn deref_mut<'a>(&'a mut self) -> &'a mut T {
-        &mut self.inner
-    }
-}
-
 /// Encapsulates a type that can be traced but is boxed in a type we don't control
 /// (such as RefCell). Wrap a field in Traceable and implement the Encodable trait
 /// for that new concrete type to achieve magic compiler-derived trace hooks.
@@ -135,12 +129,6 @@ impl<T> Deref<T> for Traceable<T> {
     }
 }
 
-impl<T> DerefMut<T> for Traceable<T> {
-    fn deref_mut<'a>(&'a mut self) -> &'a mut T {
-        &mut self.inner
-    }
-}
-
 impl<S: Encoder<E>, E, T: Encodable<S, E>> Encodable<S, E> for Traceable<RefCell<T>> {
     fn encode(&self, s: &mut S) -> Result<(), E> {
         self.borrow().encode(s)