Delete old tests that aren't used and/or useful any more.

tests/compiler/dart2js/dummy_compiler_test.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file

[Johnni Winther, 2017/07/19 11:29:58]

This doesn't work. dummy_compiler_test and recursive_import_test were testing
that dart2js could compile dart2js. Putting these in tests/compiler/dart2js
means that only the vm runs these tests (and we know that the vm can run
dart2js.

 // 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.
 
 // Smoke test of the dart2js compiler API.
 library dummy_compiler;
 
 import 'dart:async';
-import "package:async_helper/async_helper.dart";
 
+import 'package:async_helper/async_helper.dart';
 import 'package:compiler/compiler.dart';
 
-import '../compiler/dart2js/mock_libraries.dart';
+import 'mock_libraries.dart';
 
 String libProvider(Uri uri) {
   if (uri.path.endsWith(".platform")) {
     return DEFAULT_PLATFORM_CONFIG;
   }
   if (uri.path.endsWith("/core.dart")) {
     return buildLibrarySource(DEFAULT_CORE_LIBRARY);
   } else if (uri.path.endsWith('core_patch.dart')) {
     return DEFAULT_PATCH_CORE_SOURCE;
   } else if (uri.path.endsWith('internal.dart')) {
@@ skipping 40 matching lines @@
       provider,
       handler);
   result.then((CompilationResult result) {
     if (!result.isSuccess) {
       throw 'Compilation failed';
     }
   }, onError: (e, s) {
     throw 'Compilation failed: $e\n$s';
   }).then(asyncSuccess);
 }