diff --git a/components/script/dom/canvasrenderingcontext2d.rs b/components/script/dom/canvasrenderingcontext2d.rs
index 97574187038..49b179c0ccb 100644
--- a/components/script/dom/canvasrenderingcontext2d.rs
+++ b/components/script/dom/canvasrenderingcontext2d.rs
@@ -501,9 +501,6 @@ impl CanvasRenderingContext2D {
         }
     }
 
-    pub fn get_renderer_id(&self) -> usize {
-        self.renderer_id
-    }
     pub fn get_ipc_renderer(&self) -> IpcSender<CanvasMsg> {
         self.ipc_renderer.clone()
     }
@@ -518,17 +515,11 @@ impl CanvasRenderingContext2D {
 }
 
 pub trait LayoutCanvasRenderingContext2DHelpers {
-    #[allow(unsafe_code)]
-    unsafe fn get_renderer_id(&self) -> usize;
     #[allow(unsafe_code)]
     unsafe fn get_ipc_renderer(&self) -> IpcSender<CanvasMsg>;
 }
 
 impl LayoutCanvasRenderingContext2DHelpers for LayoutJS<CanvasRenderingContext2D> {
-    #[allow(unsafe_code)]
-    unsafe fn get_renderer_id(&self) -> usize {
-        (*self.unsafe_get()).renderer_id
-    }
     #[allow(unsafe_code)]
     unsafe fn get_ipc_renderer(&self) -> IpcSender<CanvasMsg> {
         (*self.unsafe_get()).ipc_renderer.clone()
diff --git a/components/script/dom/webglrenderingcontext.rs b/components/script/dom/webglrenderingcontext.rs
index aba9e32b45f..53393f987e6 100644
--- a/components/script/dom/webglrenderingcontext.rs
+++ b/components/script/dom/webglrenderingcontext.rs
@@ -1194,17 +1194,11 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
 }
 
 pub trait LayoutCanvasWebGLRenderingContextHelpers {
-    #[allow(unsafe_code)]
-    unsafe fn get_renderer_id(&self) -> usize;
     #[allow(unsafe_code)]
     unsafe fn get_ipc_renderer(&self) -> IpcSender<CanvasMsg>;
 }
 
 impl LayoutCanvasWebGLRenderingContextHelpers for LayoutJS<WebGLRenderingContext> {
-    #[allow(unsafe_code)]
-    unsafe fn get_renderer_id(&self) -> usize {
-        (*self.unsafe_get()).renderer_id
-    }
     #[allow(unsafe_code)]
     unsafe fn get_ipc_renderer(&self) -> IpcSender<CanvasMsg> {
         (*self.unsafe_get()).ipc_renderer.clone()