Revert "Support runtime check of function types."

tests/language/function_subtype_typearg0_test.dart

Index: tests/language/function_subtype_typearg0_test.dart
diff --git a/tests/language/function_subtype_typearg0_test.dart b/tests/language/function_subtype_typearg0_test.dart
deleted file mode 100644
index 58f9d98fc1b42ab2c37358b6bb99e60bd7285134..0000000000000000000000000000000000000000
--- a/tests/language/function_subtype_typearg0_test.dart
+++ /dev/null
@@ -1,29 +0,0 @@
-// Copyright (c) 2013, 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.
-// Dart test program for constructors and initializers.
-
-// Check function subtyping with type variables in factory constructors.
-
-import 'package:expect/expect.dart';
-
-typedef void Foo();
-
-class A<T> {
-  bool foo(a) => a is T;
-}
-
-void bar1() {}
-void bar2(i) {}
-
-void main() {
-  void bar3() {}
-  void bar4(i) {}
-
-  Expect.isTrue(new A<Foo>().foo(bar1));
-  Expect.isFalse(new A<Foo>().foo(bar2));
-  Expect.isTrue(new A<Foo>().foo(bar3));
-  Expect.isFalse(new A<Foo>().foo(bar4));
-  Expect.isTrue(new A<Foo>().foo((){}));
-  Expect.isFalse(new A<Foo>().foo((i){}));
-}