Revert "Support runtime check of function types."

tests/language/function_subtype_call0_test.dart

Index: tests/language/function_subtype_call0_test.dart
diff --git a/tests/language/function_subtype_call0_test.dart b/tests/language/function_subtype_call0_test.dart
deleted file mode 100644
index d8626835c8474fd209ff7e9abf1dd02b6781df66..0000000000000000000000000000000000000000
--- a/tests/language/function_subtype_call0_test.dart
+++ /dev/null
@@ -1,42 +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 for classes with call functions.
-
-import 'package:expect/expect.dart';
-
-typedef void Foo(bool a, [String b]);
-typedef void Bar(bool a, [String b]);
-typedef void Baz(bool a, {String b});
-typedef void Boz(bool a);
-
-class C1 {
-  void call(bool a, [String b]) {}
-}
-
-class C2 {
-  void call(bool a, {String b}) {}
-}
-
-class C3 {
-  void call(bool a, {int b}) {}
-}
-
-main() {
-  Expect.isTrue(new C1() is Foo, 'new C1() is Foo');
-  Expect.isTrue(new C1() is Bar, 'new C1() is Bar');
-  Expect.isFalse(new C1() is Baz, 'new C1() is Baz');
-  Expect.isTrue(new C1() is Boz, 'new C1() is Boz');
-
-  Expect.isFalse(new C2() is Foo, 'new C2() is Foo');
-  Expect.isFalse(new C2() is Bar, 'new C2() is Bar');
-  Expect.isTrue(new C2() is Baz, 'new C2() is Baz');
-  Expect.isTrue(new C2() is Boz, 'new C2() is Boz');
-
-  Expect.isFalse(new C3() is Foo, 'new C3() is Foo');
-  Expect.isFalse(new C3() is Bar, 'new C3() is Bar');
-  Expect.isFalse(new C3() is Baz, 'new C3() is Baz');
-  Expect.isTrue(new C3() is Boz, 'new C3() is Boz');
-}