Revert "Finalize reachable weak persistent handles at isolate shutdown."

runtime/vm/dart_api_impl_test.cc

Index: runtime/vm/dart_api_impl_test.cc
diff --git a/runtime/vm/dart_api_impl_test.cc b/runtime/vm/dart_api_impl_test.cc
index 632f4a4f71dc45ff5c4d9e8ec206b405ef29246b..0f1435746fc262fcc50fede506346957fbf5def6 100644
--- a/runtime/vm/dart_api_impl_test.cc
+++ b/runtime/vm/dart_api_impl_test.cc
@@ -1438,19 +1438,6 @@ TEST_CASE(WeakPersistentHandleCallback) {
 }
 
 
-UNIT_TEST_CASE(WeakPersistentHandlesCallbackShutdown) {
-  TestCase::CreateTestIsolate();
-  Dart_EnterScope();
-  Dart_Handle ref = Dart_True();
-  int peer = 1234;
-  Dart_NewWeakPersistentHandle(ref,
-                               &peer,
-                               WeakPersistentHandlePeerFinalizer);
-  Dart_ShutdownIsolate();
-  EXPECT(peer == 42);
-}
-
-
 TEST_CASE(ObjectGroups) {
   Dart_Handle strong = Dart_Null();
   EXPECT(Dart_IsNull(strong));