Remove generated directories with 100s of files.

client/html/generated/html/dartium/DOMPluginArray.dart

Index: client/html/generated/html/dartium/DOMPluginArray.dart
diff --git a/client/html/generated/html/dartium/DOMPluginArray.dart b/client/html/generated/html/dartium/DOMPluginArray.dart
deleted file mode 100644
index 1d71c79770abebd497ec42d71bb6c4e1eeb2270d..0000000000000000000000000000000000000000
--- a/client/html/generated/html/dartium/DOMPluginArray.dart
+++ /dev/null
@@ -1,19 +0,0 @@
-
-class _DOMPluginArrayImpl extends _DOMTypeBase implements DOMPluginArray {
-  _DOMPluginArrayImpl._wrap(ptr) : super._wrap(ptr);
-
-  int get length() => _wrap(_ptr.length);
-
-  DOMPlugin item(int index) {
-    return _wrap(_ptr.item(_unwrap(index)));
-  }
-
-  DOMPlugin namedItem(String name) {
-    return _wrap(_ptr.namedItem(_unwrap(name)));
-  }
-
-  void refresh(bool reload) {
-    _ptr.refresh(_unwrap(reload));
-    return;
-  }
-}