diff --git a/components/script/dom/blob.rs b/components/script/dom/blob.rs
index 1a7d2a216363..9afd784a977f 100644
--- a/components/script/dom/blob.rs
+++ b/components/script/dom/blob.rs
@@ -40,9 +40,6 @@ impl Blob {
     }
 }
 
-pub trait BlobMethods {
-}
-
 impl Reflectable for Blob {
     fn reflector<'a>(&'a self) -> &'a Reflector {
         &self.reflector_
diff --git a/components/script/dom/comment.rs b/components/script/dom/comment.rs
index e50b24b2a583..fee61266cd3d 100644
--- a/components/script/dom/comment.rs
+++ b/components/script/dom/comment.rs
@@ -45,9 +45,6 @@ impl Comment {
     }
 }
 
-pub trait CommentMethods {
-}
-
 impl Reflectable for Comment {
     fn reflector<'a>(&'a self) -> &'a Reflector {
         self.characterdata.reflector()