Revert "Support runtime check of function types."

tests/language/function_subtype_optional2_test.dart

Index: tests/language/function_subtype_optional2_test.dart
diff --git a/tests/language/function_subtype_optional2_test.dart b/tests/language/function_subtype_optional2_test.dart
deleted file mode 100644
index 4ca61e8f8eb88b4871caa72150789022d99205d5..0000000000000000000000000000000000000000
--- a/tests/language/function_subtype_optional2_test.dart
+++ /dev/null
@@ -1,60 +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.
-
-import 'package:expect/expect.dart';
-
-class C<T> {}
-
-typedef void void_();
-typedef void void__int(int i);
-typedef void void___int([int i]);
-typedef void void___int2([int i]);
-typedef void void___Object([Object o]);
-typedef void void__int__int(int i1, [int i2]);
-typedef void void__int__int2(int i1, [int i2]);
-typedef void void__int__int_int(int i1, [int i2, int i3]);
-typedef void void___double(double d);
-typedef void void___int_int([int i1, int i2]);
-typedef void void___int_int_int([int i1, int i2, int i3]);
-typedef void void___Object_int([Object o, int i]);
-
-main() {
-  // Test ([int])->void <: ()->void.
-  Expect.isTrue(new C<void___int>() is C<void_>);
-  // Test ([int])->void <: (int)->void.
-  Expect.isTrue(new C<void___int>() is C<void__int>);
-  // Test (int)->void <: ([int])->void.
-  Expect.isFalse(new C<void__int>() is C<void___int>);
-  // Test ([int])->void <: ([int])->void.
-  Expect.isTrue(new C<void___int>() is C<void___int2>);
-  // Test ([Object])->void <: ([int])->void.
-  Expect.isTrue(new C<void___Object>() is C<void___int>);
-  // Test ([int])->void <: ([Object])->void.
-  Expect.isTrue(new C<void___int>() is C<void___Object>);
-  // Test (int,[int])->void <: (int)->void.
-  Expect.isTrue(new C<void__int__int>() is C<void__int>);
-  // Test (int,[int])->void <: (int,[int])->void.
-  Expect.isTrue(new C<void__int__int>() is C<void__int__int2>);
-  // Test (int)->void <: ([int])->void.
-  Expect.isFalse(new C<void__int>() is C<void___int>);
-  // Test ([int,int])->void <: (int)->void.
-  Expect.isTrue(new C<void___int_int>() is C<void__int>);
-  // Test ([int,int])->void <: (int,[int])->void.
-  Expect.isTrue(new C<void___int_int>() is C<void__int__int>);
-  // Test ([int,int])->void <: (int,[int,int])->void.
-  Expect.isFalse(new C<void___int_int>() is C<void__int__int_int>);
-  // Test ([int,int,int])->void <: (int,[int,int])->void.
-  Expect.isTrue(new C<void___int_int_int>() is C<void__int__int_int>);
-  // Test ([int])->void <: ([double])->void.
-  Expect.isFalse(new C<void___int>() is C<void___double>);
-  // Test ([int])->void <: ([int,int])->void.
-  Expect.isFalse(new C<void___int>() is C<void___int_int>);
-  // Test ([int,int])->void <: ([int])->void.
-  Expect.isTrue(new C<void___int_int>() is C<void___int>);
-  // Test ([Object,int])->void <: ([int])->void.
-  Expect.isTrue(new C<void___Object_int>() is C<void___int>);
-}