diff --git a/gfx/layers/wr/WebRenderLayerManager.cpp b/gfx/layers/wr/WebRenderLayerManager.cpp
index 2158365b7aaa..dfa4bad5ece3 100644
--- a/gfx/layers/wr/WebRenderLayerManager.cpp
+++ b/gfx/layers/wr/WebRenderLayerManager.cpp
@@ -225,24 +225,6 @@ WebRenderLayerManager::EndEmptyTransaction(EndTransactionFlags aFlags)
   return true;
 }
 
-/*static*/ int32_t
-PopulateScrollData(WebRenderScrollData& aTarget, Layer* aLayer)
-{
-  MOZ_ASSERT(aLayer);
-
-  // We want to allocate a WebRenderLayerScrollData object for this layer,
-  // but don't keep a pointer to it since it might get memmove'd during the
-  // recursion below. Instead keep the index and get the pointer later.
-  size_t index = aTarget.AddNewLayerData();
-
-  int32_t descendants = 0;
-  for (Layer* child = aLayer->GetLastChild(); child; child = child->GetPrevSibling()) {
-    descendants += PopulateScrollData(aTarget, child);
-  }
-  aTarget.GetLayerDataMutable(index)->Initialize(aTarget, aLayer, descendants);
-  return descendants + 1;
-}
-
 void
 WebRenderLayerManager::EndTransaction(DrawPaintedLayerCallback aCallback,
                                       void* aCallbackData,
diff --git a/gfx/layers/wr/WebRenderScrollData.cpp b/gfx/layers/wr/WebRenderScrollData.cpp
index 1dcd30e2f199..97ce9a5b1de0 100644
--- a/gfx/layers/wr/WebRenderScrollData.cpp
+++ b/gfx/layers/wr/WebRenderScrollData.cpp
@@ -32,37 +32,6 @@ WebRenderLayerScrollData::~WebRenderLayerScrollData()
 {
 }
 
-void
-WebRenderLayerScrollData::Initialize(WebRenderScrollData& aOwner,
-                                     Layer* aLayer,
-                                     int32_t aDescendantCount)
-{
-  MOZ_ASSERT(aDescendantCount >= 0); // Ensure value is valid
-  MOZ_ASSERT(mDescendantCount == -1); // Don't allow re-setting an already set value
-  mDescendantCount = aDescendantCount;
-
-  MOZ_ASSERT(aLayer);
-  for (uint32_t i = 0; i < aLayer->GetScrollMetadataCount(); i++) {
-    mScrollIds.AppendElement(aOwner.AddMetadata(aLayer->GetScrollMetadata(i)));
-  }
-
-  mTransform = aLayer->GetTransform();
-  mTransformIsPerspective = aLayer->GetTransformIsPerspective();
-  mEventRegions = aLayer->GetEventRegions();
-  mVisibleRegion = aLayer->GetVisibleRegion();
-  mReferentId = aLayer->AsRefLayer()
-      ? Some(aLayer->AsRefLayer()->GetReferentId())
-      : Nothing();
-  mEventRegionsOverride = aLayer->AsContainerLayer()
-      ? aLayer->AsContainerLayer()->GetEventRegionsOverride()
-      : EventRegionsOverride::NoOverride;
-  mScrollThumbData = aLayer->GetScrollThumbData();
-  mScrollbarAnimationId = aLayer->GetCompositorAnimationsId();
-  mScrollbarTargetContainerId = aLayer->GetScrollbarTargetContainerId();
-  mIsScrollbarContainer = aLayer->IsScrollbarContainer();
-  mFixedPosScrollContainerId = aLayer->GetFixedPositionScrollContainerId();
-}
-
 void
 WebRenderLayerScrollData::InitializeRoot(int32_t aDescendantCount)
 {
diff --git a/gfx/layers/wr/WebRenderScrollData.h b/gfx/layers/wr/WebRenderScrollData.h
index 0ec680e5ecae..1e016331a604 100644
--- a/gfx/layers/wr/WebRenderScrollData.h
+++ b/gfx/layers/wr/WebRenderScrollData.h
@@ -42,12 +42,6 @@ public:
   WebRenderLayerScrollData(); // needed for IPC purposes
   ~WebRenderLayerScrollData();
 
-  // Actually initialize the object. This is not done during the constructor
-  // for optimization purposes (the call site is hard to write efficiently
-  // if we do this in the constructor).
-  void Initialize(WebRenderScrollData& aOwner,
-                  Layer* aLayer,
-                  int32_t aDescendantCount);
   void InitializeRoot(int32_t aDescendantCount);
   void Initialize(WebRenderScrollData& aOwner,
                   nsDisplayItem* aItem,