diff --git a/gfx/wr/webrender/src/device/gl.rs b/gfx/wr/webrender/src/device/gl.rs
index 4e5471a4676f..b7ea8105c076 100644
--- a/gfx/wr/webrender/src/device/gl.rs
+++ b/gfx/wr/webrender/src/device/gl.rs
@@ -199,10 +199,6 @@ pub fn get_unoptimized_shader_source(shader_name: &str, base_path: Option<&PathB
     }
 }
 
-pub trait FileWatcherHandler: Send {
-    fn file_changed(&self, path: PathBuf);
-}
-
 impl VertexAttributeKind {
     fn size_in_bytes(&self) -> u32 {
         match *self {
diff --git a/gfx/wr/webrender/src/resource_cache.rs b/gfx/wr/webrender/src/resource_cache.rs
index 349be25cb803..aee3cbe24121 100644
--- a/gfx/wr/webrender/src/resource_cache.rs
+++ b/gfx/wr/webrender/src/resource_cache.rs
@@ -193,12 +193,6 @@ struct ImageResource {
     generation: ImageGeneration,
 }
 
-#[derive(Clone, Debug)]
-pub struct ImageTiling {
-    pub image_size: DeviceIntSize,
-    pub tile_size: TileSize,
-}
-
 #[derive(Default)]
 struct ImageTemplates {
     images: FastHashMap<ImageKey, ImageResource>,
diff --git a/gfx/wr/webrender/src/texture_pack/mod.rs b/gfx/wr/webrender/src/texture_pack/mod.rs
index f89a82b0a124..ebc92ccbe9ba 100644
--- a/gfx/wr/webrender/src/texture_pack/mod.rs
+++ b/gfx/wr/webrender/src/texture_pack/mod.rs
@@ -57,8 +57,6 @@ pub trait AtlasAllocatorList<TextureParameters> {
 
     fn set_handle(&mut self, texture_id: CacheTextureId, alloc_id: AllocId, handle: &TextureCacheHandle);
 
-    fn remove_handle(&mut self, texture_id: CacheTextureId, alloc_id: AllocId);
-
     /// Deallocate a rectangle and return its size.
     fn deallocate(&mut self, texture_id: CacheTextureId, alloc_id: AllocId);
 
@@ -235,14 +233,6 @@ for AllocatorList<Allocator, TextureParameters> {
         unit.handles.insert(alloc_id, handle.clone());
     }
 
-    fn remove_handle(&mut self, texture_id: CacheTextureId, alloc_id: AllocId) {
-        let unit = self.units
-            .iter_mut()
-            .find(|unit| unit.texture_id == texture_id)
-            .expect("Unable to find the associated texture array unit");
-        unit.handles.remove(&alloc_id);
-    }
-
     fn deallocate(&mut self, texture_id: CacheTextureId, alloc_id: AllocId) {
         self.deallocate(texture_id, alloc_id);
     }
diff --git a/gfx/wr/webrender/src/util.rs b/gfx/wr/webrender/src/util.rs
index 9b161313279f..3db68cd7ab65 100644
--- a/gfx/wr/webrender/src/util.rs
+++ b/gfx/wr/webrender/src/util.rs
@@ -66,9 +66,6 @@ pub trait VecHelper<T> {
     /// Equivalent to `mem::replace(&mut vec, Vec::new())`
     fn take(&mut self) -> Self;
 
-    /// Call clear and return self (useful for chaining with calls that move the vector).
-    fn cleared(self) -> Self;
-
     /// Functionally equivalent to `mem::replace(&mut vec, Vec::new())` but tries
     /// to keep the allocation in the caller if it is empty or replace it with a
     /// pre-allocated vector.
@@ -102,12 +99,6 @@ impl<T> VecHelper<T> for Vec<T> {
         replace(self, Vec::new())
     }
 
-    fn cleared(mut self) -> Self {
-        self.clear();
-
-        self
-    }
-
     fn take_and_preallocate(&mut self) -> Self {
         let len = self.len();
         if len == 0 {
@@ -399,10 +390,6 @@ pub trait MatrixHelpers<Src, Dst> {
     fn is_2d_scale_translation(&self) -> bool;
     /// Return the determinant of the 2D part of the matrix.
     fn determinant_2d(&self) -> f32;
-    /// This function returns a point in the `Src` space that projects into zero XY.
-    /// It ignores the Z coordinate and is usable for "flattened" transformations,
-    /// since they are not generally inversible.
-    fn inverse_project_2d_origin(&self) -> Option<Point2D<f32, Src>>;
     /// Turn Z transformation into identity. This is useful when crossing "flat"
     /// transform styled stacking contexts upon traversing the coordinate systems.
     fn flatten_z_output(&mut self);
@@ -534,17 +521,6 @@ impl<Src, Dst> MatrixHelpers<Src, Dst> for Transform3D<f32, Src, Dst> {
         self.m11 * self.m22 - self.m12 * self.m21
     }
 
-    fn inverse_project_2d_origin(&self) -> Option<Point2D<f32, Src>> {
-        let det = self.determinant_2d();
-        if det != 0.0 {
-            let x = (self.m21 * self.m42 - self.m41 * self.m22) / det;
-            let y = (self.m12 * self.m41 - self.m11 * self.m42) / det;
-            Some(Point2D::new(x, y))
-        } else {
-            None
-        }
-    }
-
     fn flatten_z_output(&mut self) {
         self.m13 = 0.0;
         self.m23 = 0.0;
@@ -623,22 +599,6 @@ impl<U> RectHelpers<U> for Box2D<f32, U> {
     }
 }
 
-pub trait VectorHelpers<U>
-where
-    Self: Sized,
-{
-    fn snap(&self) -> Self;
-}
-
-impl<U> VectorHelpers<U> for Vector2D<f32, U> {
-    fn snap(&self) -> Self {
-        Vector2D::new(
-            (self.x + 0.5).floor(),
-            (self.y + 0.5).floor(),
-        )
-    }
-}
-
 pub fn lerp(a: f32, b: f32, t: f32) -> f32 {
     (b - a) * t + a
 }