Remove HeapTerminatedArray leftovers

Change-Id: I4ad3be28aba7c7620e766e1cd5ad5bc81629615c
Reviewed-on: https://chromium-review.googlesource.com/c/1339871Reviewed-by: Keishi Hattori <keishi@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#608769}

third_party/blink/renderer/platform/heap/trace_traits.h

@@ -30,8 +30,6 @@ class CrossThreadWeakPersistent;
 template <typename T>
 class HeapDoublyLinkedList;
 template <typename T>
-class HeapTerminatedArray;
-template <typename T>
 class Member;
 template <typename T>
 class TraceEagerlyTrait;
@@ -388,12 +386,6 @@ class TraceEagerlyTrait<CrossThreadWeakPersistent<T>> {
   static const bool value = TraceEagerlyTrait<T>::value;
 };
 
-template <typename T>
-class TraceEagerlyTrait<HeapTerminatedArray<T>> {
- public:
-  static const bool value = TraceEagerlyTrait<T>::value;
-};
-
 template <typename T>
 class TraceEagerlyTrait<HeapDoublyLinkedList<T>> {
   STATIC_ONLY(TraceEagerlyTrait);