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

tests/compiler/dart2js/recursive_import_test.dart

 // Copyright (c) 2012, 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.
 
 // Test of "recursive" imports using the dart2js compiler API.
 
-import "package:expect/expect.dart";
-import "package:async_helper/async_helper.dart";
 import 'dart:async';
+
+import 'package:expect/expect.dart';
+import 'package:async_helper/async_helper.dart';
+import 'package:compiler/compiler.dart';
+
 import 'dummy_compiler_test.dart';
-import 'package:compiler/compiler.dart';
 
 const String RECURSIVE_MAIN = """
 library fisk;
 import 'recurse/fisk.dart';
 main() {}
 """;
 
 main() {
   int count = 0;
   Future<String> provider(Uri uri) {
@@ skipping 41 matching lines @@
     Expect.isFalse(result.isSuccess);
     Expect.isTrue(10 < count);
     // Two warnings for each time RECURSIVE_MAIN is read, except the
     // first time.
     Expect.equals(2 * (count - 1), warningCount);
     Expect.equals(1, errorCount);
   }, onError: (e, s) {
     throw 'Compilation failed: $e\n$s';
   }).then(asyncSuccess);
 }