Triage a few cps-ir failures

tests/language/type_variable_closure4_test.dart

Index: tests/language/type_variable_closure4_test.dart
diff --git a/tests/language/type_variable_closure2_test.dart b/tests/language/type_variable_closure4_test.dart
similarity index 55%
copy from tests/language/type_variable_closure2_test.dart
copy to tests/language/type_variable_closure4_test.dart
index 1b55ff9aca86a202fb0bafdca3fe49f398da92c4..e75bc085dc16f134f4259bcc0a0deca6b08f995e 100644
--- a/tests/language/type_variable_closure2_test.dart
+++ b/tests/language/type_variable_closure4_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
@@ -7,24 +7,12 @@ import "package:expect/expect.dart";
 class A<T> {}
 
 class C<T> {
-  a() {
-    return () => new A<T>();
-  }
-
-  list() {
-    return () => <T>[];
-  }
-
   map() {
     return () => <T, T>{};
   }
 }
 
 main() {
-  Expect.isTrue(new C<int>().a()() is A<int>);
-  Expect.isFalse(new C<int>().a()() is A<String>);
-  Expect.isTrue(new C<int>().list()() is List<int>);
-  Expect.isFalse(new C<int>().list()() is List<String>);
   Expect.isTrue(new C<int>().map()() is Map<int, int>);
   Expect.isFalse(new C<int>().map()() is Map<String, int>);
   Expect.isFalse(new C<int>().map()() is Map<int, String>);