Remove generated directories with 100s of files.

client/html/generated/html/frog/Console.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.
-
-class _ConsoleImpl
-    // Console is sometimes a singleton bag-of-properties without a prototype.
-    implements Console 
-    native "=(typeof console == 'undefined' ? {} : console)" {
-
-  final _MemoryInfoImpl memory;
-
-  final List profiles;
-
-  void assertCondition(bool condition, Object arg) native;
-
-  void count() native;
-
-  void debug(Object arg) native;
-
-  void dir() native;
-
-  void dirxml() native;
-
-  void error(Object arg) native;
-
-  void group(Object arg) native;
-
-  void groupCollapsed(Object arg) native;
-
-  void groupEnd() native;
-
-  void info(Object arg) native;
-
-  void log(Object arg) native;
-
-  void markTimeline() native;
-
-  void profile(String title) native;
-
-  void profileEnd(String title) native;
-
-  void time(String title) native;
-
-  void timeEnd(String title, Object arg) native;
-
-  void timeStamp(Object arg) native;
-
-  void trace(Object arg) native;
-
-  void warn(Object arg) native;
-
-}