Remove generated directories with 100s of files.

client/html/generated/html/dartium/SourceElement.dart

Index: client/html/generated/html/dartium/SourceElement.dart
diff --git a/client/html/generated/html/dartium/SourceElement.dart b/client/html/generated/html/dartium/SourceElement.dart
deleted file mode 100644
index a7afab0d5b412bf9e0389e228c57feaa1e603a74..0000000000000000000000000000000000000000
--- a/client/html/generated/html/dartium/SourceElement.dart
+++ /dev/null
@@ -1,16 +0,0 @@
-
-class _SourceElementImpl extends _ElementImpl implements SourceElement {
-  _SourceElementImpl._wrap(ptr) : super._wrap(ptr);
-
-  String get media() => _wrap(_ptr.media);
-
-  void set media(String value) { _ptr.media = _unwrap(value); }
-
-  String get src() => _wrap(_ptr.src);
-
-  void set src(String value) { _ptr.src = _unwrap(value); }
-
-  String get type() => _wrap(_ptr.type);
-
-  void set type(String value) { _ptr.type = _unwrap(value); }
-}