Remove frog from the repository.

frog/lang.dart

Index: frog/lang.dart
diff --git a/frog/lang.dart b/frog/lang.dart
deleted file mode 100644
index ec1d82494987aeca9f4e868edbe149cd1ff22eff..0000000000000000000000000000000000000000
--- a/frog/lang.dart
+++ /dev/null
@@ -1,36 +0,0 @@
-// Copyright (c) 2011, 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.
-
-#library('lang');
-
-#import('dart:coreimpl');
-#import('file_system.dart');
-
-#source('analyze.dart');
-#source('analyze_frame.dart');
-#source('block_scope.dart');
-#source('code_writer.dart');
-#source('corejs.dart');
-#source('element.dart');
-#source('gen.dart');
-#source('library.dart');
-#source('member.dart');
-#source('member_set.dart');
-#source('method_data.dart');
-#source('token.dart');
-#source('source.dart');
-#source('tokenizer.dart');
-#source('tokenizer.g.dart');
-#source('token_kind.g.dart');
-#source('parser.dart');
-#source('tree.dart');
-#source('tree.g.dart');
-#source('type.dart');
-#source('utils.dart');
-#source('value.dart');
-#source('world.dart');
-#source('frog_options.dart');
-#source('reader.dart');
-#source('var_member.dart');
-#source('../lib/compiler/implementation/ssa/js_names.dart');