Remove generated directories with 100s of files.

client/html/generated/html/interface/MeterElement.dart

Index: client/html/generated/html/interface/MeterElement.dart
diff --git a/client/html/generated/html/interface/MeterElement.dart b/client/html/generated/html/interface/MeterElement.dart
deleted file mode 100644
index f25ef05756f7f743d48b7ead93b80a29bfcb25a8..0000000000000000000000000000000000000000
--- a/client/html/generated/html/interface/MeterElement.dart
+++ /dev/null
@@ -1,24 +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 MeterElement extends Element {
-
-  final FormElement form;
-
-  num high;
-
-  final NodeList labels;
-
-  num low;
-
-  num max;
-
-  num min;
-
-  num optimum;
-
-  num value;
-}