diff --git a/components/script/dom/window.rs b/components/script/dom/window.rs
index abe693696fd..e86668c9ae2 100644
--- a/components/script/dom/window.rs
+++ b/components/script/dom/window.rs
@@ -917,9 +917,7 @@ impl Window {
             },
             document: self.Document().r().upcast::<Node>().to_trusted_node_address(),
             window_size: window_size,
-            script_chan: self.control_chan.clone(),
             script_join_chan: join_chan,
-            id: last_reflow_id.get(),
             query_type: query_type,
         };
 
diff --git a/components/script/layout_interface.rs b/components/script/layout_interface.rs
index 5c41a04363c..6dab946f6fb 100644
--- a/components/script/layout_interface.rs
+++ b/components/script/layout_interface.rs
@@ -175,14 +175,10 @@ pub struct ScriptReflow {
     pub reflow_info: Reflow,
     /// The document node.
     pub document: TrustedNodeAddress,
-    /// The channel through which messages can be sent back to the script task.
-    pub script_chan: Sender<ConstellationControlMsg>,
     /// The current window size.
     pub window_size: WindowSizeData,
     /// The channel that we send a notification to.
     pub script_join_chan: Sender<()>,
-    /// Unique identifier
-    pub id: u32,
     /// The type of query if any to perform during this reflow.
     pub query_type: ReflowQueryType,
 }