[factory] Remove unused function CopyAndTenureFixedCOWArray

Bug: v8:3221
Change-Id: I8955057b87ba7bb3a288e5454bb405faa67df6ed
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3010282Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Auto-Submit: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75608}

src/heap/factory.cc

@@ -2044,19 +2044,6 @@ Handle<FixedArray> Factory::CopyFixedArray(Handle<FixedArray> array) {
   return CopyArrayWithMap(array, handle(array->map(), isolate()));
 }
 
-Handle<FixedArray> Factory::CopyAndTenureFixedCOWArray(
-    Handle<FixedArray> array) {
-  DCHECK(Heap::InYoungGeneration(*array));
-  Handle<FixedArray> result =
-      CopyFixedArrayUpTo(array, array->length(), AllocationType::kOld);
-
-  // TODO(mvstanton): The map is set twice because of protection against calling
-  // set() on a COW FixedArray. Issue v8:3221 created to track this, and
-  // we might then be able to remove this whole method.
-  result->set_map_after_allocation(*fixed_cow_array_map(), SKIP_WRITE_BARRIER);
-  return result;
-}
-
 Handle<FixedDoubleArray> Factory::CopyFixedDoubleArray(
     Handle<FixedDoubleArray> array) {
   int len = array->length();

src/heap/factory.h

@@ -467,10 +467,6 @@ class V8_EXPORT_PRIVATE Factory : public FactoryBase<Factory> {
 
   Handle<FixedArray> CopyFixedArray(Handle<FixedArray> array);
 
-  // This method expects a COW array in new space, and creates a copy
-  // of it in old space.
-  Handle<FixedArray> CopyAndTenureFixedCOWArray(Handle<FixedArray> array);
-
   Handle<FixedDoubleArray> CopyFixedDoubleArray(Handle<FixedDoubleArray> array);
 
   // Creates a new HeapNumber in read-only space if possible otherwise old