Remove generated directories with 100s of files.

client/html/generated/html/dartium/DOMPlugin.dart

Index: client/html/generated/html/dartium/DOMPlugin.dart
diff --git a/client/html/generated/html/dartium/DOMPlugin.dart b/client/html/generated/html/dartium/DOMPlugin.dart
deleted file mode 100644
index 4315cdcf99b3a0554eb2b5157d67d20ec2ab6053..0000000000000000000000000000000000000000
--- a/client/html/generated/html/dartium/DOMPlugin.dart
+++ /dev/null
@@ -1,20 +0,0 @@
-
-class _DOMPluginImpl extends _DOMTypeBase implements DOMPlugin {
-  _DOMPluginImpl._wrap(ptr) : super._wrap(ptr);
-
-  String get description() => _wrap(_ptr.description);
-
-  String get filename() => _wrap(_ptr.filename);
-
-  int get length() => _wrap(_ptr.length);
-
-  String get name() => _wrap(_ptr.name);
-
-  DOMMimeType item(int index) {
-    return _wrap(_ptr.item(_unwrap(index)));
-  }
-
-  DOMMimeType namedItem(String name) {
-    return _wrap(_ptr.namedItem(_unwrap(name)));
-  }
-}