Delete support for source mirrors

tests/compiler/dart2js/mirrors/default_value_test.dart

-// 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.
-
-import "dart:mirrors";
-
-import "package:async_helper/async_helper.dart";
-import "package:expect/expect.dart";
-import "../memory_compiler.dart";
-
-const SOURCE = const {
-  'main.dart': """
-library main;
-
-class Class {
-  var a, b, c, d, e, f, g, h;
-  Class.optional(this.a, int b, void this.c(), 
-                 [this.d, int this.e, void this.f(), 
-                  this.g = 0, int this.h = 0]);
-  Class.named(this.a, int b, void this.c(), 
-                 {this.d, int this.e, void this.f(), 
-                  this.g: 0, int this.h: 0});
-  methodOptional(a, int b, void c(), 
-                 [d, int e, void f(), 
-                  g = 0, int h = 0]) {}
-  methodNamed(a, int b, void c(), 
-              {d, int e, void f(), 
-               g: 0, int h: 0}) {}
-} 
-""",
-};
-
-main() {
-  asyncTest(() => mirrorSystemFor(SOURCE).then((MirrorSystem mirrors) {
-    LibraryMirror dartCore = mirrors.libraries[Uri.parse('memory:main.dart')];
-    ClassMirror classMirror = dartCore.declarations[#Class];
-    testMethod(classMirror.declarations[#optional]);
-    testMethod(classMirror.declarations[#named]);
-    testMethod(classMirror.declarations[#methodOptional]);
-    testMethod(classMirror.declarations[#methodNamed]);
-  }));
-}
-
-testMethod(MethodMirror mirror) {
-  Expect.equals(8, mirror.parameters.length);
-  for (int i = 0 ; i < 6 ; i++) {
-    testParameter(mirror.parameters[i], false);
-  }
-  for (int i = 6 ; i < 8 ; i++) {
-    testParameter(mirror.parameters[i], true);
-  }
-}
-
-testParameter(ParameterMirror mirror, bool expectDefaultValue) {
-  if (expectDefaultValue) {
-    Expect.isTrue(mirror.hasDefaultValue);
-    Expect.isNotNull(mirror.defaultValue);
-  } else {
-    Expect.isFalse(mirror.hasDefaultValue);
-    Expect.isNull(mirror.defaultValue);
-  }
-}