Remove now-dead DefineDataPropertyUnchecked

src/runtime/runtime-object.cc

Index: src/runtime/runtime-object.cc
diff --git a/src/runtime/runtime-object.cc b/src/runtime/runtime-object.cc
index 7e95e4ec9a6cfb4a71c7919cc45bdfeaab1c284c..9366892c1014054e4dfa48098800b9e553287611 100644
--- a/src/runtime/runtime-object.cc
+++ b/src/runtime/runtime-object.cc
@@ -833,34 +833,6 @@ RUNTIME_FUNCTION(Runtime_DefineAccessorPropertyUnchecked) {
 }
 
 
-// Implements part of 8.12.9 DefineOwnProperty.
-// There are 3 cases that lead here:
-// Step 4a - define a new data property.
-// Steps 9b & 12 - replace an existing accessor property with a data property.
-// Step 12 - update an existing data property with a data or generic
-//           descriptor.
-RUNTIME_FUNCTION(Runtime_DefineDataPropertyUnchecked) {
-  HandleScope scope(isolate);
-  DCHECK(args.length() == 4);
-  CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
-  CONVERT_ARG_HANDLE_CHECKED(Name, name, 1);
-  CONVERT_ARG_HANDLE_CHECKED(Object, value, 2);
-  CONVERT_PROPERTY_ATTRIBUTES_CHECKED(attrs, 3);
-
-  LookupIterator it = LookupIterator::PropertyOrElement(
-      isolate, object, name, object, LookupIterator::OWN);
-  if (it.state() == LookupIterator::ACCESS_CHECK && !it.HasAccess()) {
-    return isolate->heap()->undefined_value();
-  }
-
-  Handle<Object> result;
-  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
-      isolate, result, JSObject::DefineOwnPropertyIgnoreAttributes(
-                           &it, value, attrs, JSObject::DONT_FORCE_FIELD));
-
-  return *result;
-}
-
 RUNTIME_FUNCTION(Runtime_DefineDataPropertyInLiteral) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 5);