diff --git a/packages/core/src/debug/debug_node.ts b/packages/core/src/debug/debug_node.ts
index d81c8fb621..1988b17017 100644
--- a/packages/core/src/debug/debug_node.ts
+++ b/packages/core/src/debug/debug_node.ts
@@ -196,11 +196,6 @@ function _queryNodeChildren(
     });
   }
 }
-
-function notImplemented(): Error {
-  throw new Error('Missing proper ivy implementation.');
-}
-
 class DebugNode__POST_R3__ implements DebugNode {
   readonly nativeNode: Node;