Migrate block 163 to Dart 2.0.

tests/language_strong/type_variable_promotion_test.dart

Index: tests/language_strong/type_variable_promotion_test.dart
diff --git a/tests/language_strong/type_variable_promotion_test.dart b/tests/language_strong/type_variable_promotion_test.dart
deleted file mode 100644
index 6be5df7dcecac24fb547082fe69bed52c5c9371d..0000000000000000000000000000000000000000
--- a/tests/language_strong/type_variable_promotion_test.dart
+++ /dev/null
@@ -1,35 +0,0 @@
-// Copyright (c) 2017, 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.
-
-import 'package:expect/expect.dart';
-
-class A {}
-
-class B extends A {}
-
-class Foo<T extends A> {
-  String foo(T x) {
-    if (x is B) {
-      var list = [x];
-      return list.runtimeType.toString();
-    }
-    return '';
-  }
-
-  List<T> bar(T x) {
-    var tlist = <T>[];
-    if (x is B) {
-      var list = [x];
-      tlist = list;
-    }
-    return tlist;
-  }
-}
-
-main() {
-  var foo = new Foo<B>();
-  var b = new B();
-  Expect.equals(foo.foo(b), 'List<B>');
-  Expect.listEquals(foo.bar(b), [b]);
-}