diff --git a/Userland/Libraries/LibJS/Runtime/VM.h b/Userland/Libraries/LibJS/Runtime/VM.h
index 8f0fcee700..1b7f9e2fde 100644
--- a/Userland/Libraries/LibJS/Runtime/VM.h
+++ b/Userland/Libraries/LibJS/Runtime/VM.h
@@ -279,8 +279,6 @@ private:
 
     [[nodiscard]] ThrowCompletionOr<Value> call_internal(FunctionObject&, Value this_value, Optional<MarkedValueList> arguments);
 
-    ThrowCompletionOr<Object*> copy_data_properties(Object& rest_object, Object const& source, HashTable<PropertyKey> const& seen_names, GlobalObject& global_object);
-
     ThrowCompletionOr<void> property_binding_initialization(BindingPattern const& binding, Value value, Environment* environment, GlobalObject& global_object);
     ThrowCompletionOr<void> iterator_binding_initialization(BindingPattern const& binding, Object* iterator, bool& iterator_done, Environment* environment, GlobalObject& global_object);