Revert "dart2js: add support for configuration-specific imports."

tests/language/config_import_test.dart

Index: tests/language/config_import_test.dart
diff --git a/tests/language/config_import_test.dart b/tests/language/config_import_test.dart
deleted file mode 100644
index 5678e8ea09cd53b0fc21675814afbd186f65efaf..0000000000000000000000000000000000000000
--- a/tests/language/config_import_test.dart
+++ /dev/null
@@ -1,30 +0,0 @@
-// Copyright (c) 2015, 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.
-//
-// DartOptions=-Did=true -Ddotted.id=some_string -Dlots.of.dots.In.id=false --conditional-directives
-
-import 'package:expect/expect.dart';
-
-import 'config_import_lib1a.dart'
-  if (id) 'config_import_lib1b.dart'
-  if (not.set.id) 'config_import_lib1c.dart';
-
-import 'config_import_lib2a.dart'
-  if (not.set.id) 'config_import_lib2b.dart'
-  if (not.set.either) 'config_import_lib2c.dart';
-
-import 'config_import_lib3a.dart'
-  if (dotted.id == "some_string") 'config_import_lib3b.dart'
-  if (id) 'config_import_lib3c.dart';
-
-import 'config_import_lib4a.dart'
-  if (lots.of.dots.In.id == "other") 'config_import_lib4b.dart'
-  if (lots.of.dots.In.id == "false") 'config_import_lib4c.dart';
-
-main() {
-  Expect.equals("b", lib1());
-  Expect.equals("a", lib2());
-  Expect.equals("b", lib3());
-  Expect.equals("c", lib4());
-}