Remove generated directories with 100s of files.

client/html/generated/html/interface/CSSRule.dart

Index: client/html/generated/html/interface/CSSRule.dart
diff --git a/client/html/generated/html/interface/CSSRule.dart b/client/html/generated/html/interface/CSSRule.dart
deleted file mode 100644
index 27be42898557383c7d1994a6ef461ff4bd8021e9..0000000000000000000000000000000000000000
--- a/client/html/generated/html/interface/CSSRule.dart
+++ /dev/null
@@ -1,36 +0,0 @@
-// 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.
-
-// WARNING: Do not edit - generated code.
-
-interface CSSRule {
-
-  static final int CHARSET_RULE = 2;
-
-  static final int FONT_FACE_RULE = 5;
-
-  static final int IMPORT_RULE = 3;
-
-  static final int MEDIA_RULE = 4;
-
-  static final int PAGE_RULE = 6;
-
-  static final int STYLE_RULE = 1;
-
-  static final int UNKNOWN_RULE = 0;
-
-  static final int WEBKIT_KEYFRAMES_RULE = 7;
-
-  static final int WEBKIT_KEYFRAME_RULE = 8;
-
-  static final int WEBKIT_REGION_RULE = 10;
-
-  String cssText;
-
-  final CSSRule parentRule;
-
-  final CSSStyleSheet parentStyleSheet;
-
-  final int type;
-}