Remove IsolateLightTest and the corresponding suppression.

client/tests/client/dom/IsolateLightTest.dart

Index: client/tests/client/dom/IsolateLightTest.dart
diff --git a/client/tests/client/dom/IsolateLightTest.dart b/client/tests/client/dom/IsolateLightTest.dart
deleted file mode 100644
index bade2f8dcff3a82b29a30dc5f9544b40ce42ba8b..0000000000000000000000000000000000000000
--- a/client/tests/client/dom/IsolateLightTest.dart
+++ /dev/null
@@ -1,39 +0,0 @@
-#library('IsolateLightTest');
-#import('../../../../lib/unittest/unittest_dom.dart');
-#import('dart:dom');
-#import('dart:json');
-#import('dart:isolate');
-
-var _isolateId;
-
-class TestIsolate extends Isolate {
-  TestIsolate() : super.light();
-
-  void main() {
-    _isolateId = 1;
-    final div = document.getElementById('testid');
-
-    // These events fire in the main isolate.  Note, dispatchEvent is
-    // handled synchronously.
-    Event event = document.createEvent('Event');
-    event.initEvent('test', true, false);
-    div.dispatchEvent(event);
-
-    Expect.equals(1, _isolateId);
-    event = document.createEvent('Event');
-    event.initEvent('done', true, false);
-    div.dispatchEvent(event);
-  }
-}
-
-main() {
-  _isolateId = 0;
-  asyncTest('IsolatedStatic', 1, () {
-    final div = document.createElement('div');
-    div.id = 'testid';
-    document.body.appendChild(div);
-    div.addEventListener('test', (e) => Expect.equals(0, _isolateId), false);
-    div.addEventListener('done', (e) => callbackDone(), false);
-    new TestIsolate().spawn();
-  });
-}