Reorganize the dart2js transformer tests.

sdk/lib/_internal/pub/test/build/ignores_entrypoints_in_asset_test.dart

Index: sdk/lib/_internal/pub/test/build/ignores_entrypoints_in_asset_test.dart
diff --git a/sdk/lib/_internal/pub/test/build/ignores_entrypoints_in_asset_test.dart b/sdk/lib/_internal/pub/test/build/ignores_entrypoints_in_asset_test.dart
deleted file mode 100644
index 0f41ae1f6e7c338d4d9cd5441362ced878456987..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub/test/build/ignores_entrypoints_in_asset_test.dart
+++ /dev/null
@@ -1,34 +0,0 @@
-// Copyright (c) 2014, 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 '../descriptor.dart' as d;
-import '../test_pub.dart';
-
-main() {
-  initConfig();
-
-  integration("ignores entrypoint Dart files in asset/", () {
-    d.dir(appPath, [
-      d.appPubspec(),
-      d.dir('asset', [
-        d.file('file.dart', 'void main() => print("hello");'),
-      ]),
-      d.dir('web', [
-        d.file('index.html', 'html'),
-      ])
-    ]).create();
-
-    schedulePub(args: ["build", "--all"],
-        output: new RegExp(r'Built 1 file to "build".'));
-
-    d.dir(appPath, [
-      d.dir('build', [
-        d.nothing('asset'),
-        d.dir('web', [
-          d.file('index.html', 'html')
-        ])
-      ])
-    ]).validate();
-  });
-}