Remove generated directories with 100s of files.

client/html/generated/html/frog/SelectElement.dart

Index: client/html/generated/html/frog/SelectElement.dart
diff --git a/client/html/generated/html/frog/SelectElement.dart b/client/html/generated/html/frog/SelectElement.dart
deleted file mode 100644
index 33451a16d28496d080e1443b823ef0e9f26192ce..0000000000000000000000000000000000000000
--- a/client/html/generated/html/frog/SelectElement.dart
+++ /dev/null
@@ -1,45 +0,0 @@
-
-class _SelectElementImpl extends _ElementImpl implements SelectElement native "*HTMLSelectElement" {
-
-  bool autofocus;
-
-  bool disabled;
-
-  final _FormElementImpl form;
-
-  final _NodeListImpl labels;
-
-  int length;
-
-  bool multiple;
-
-  String name;
-
-  final _HTMLOptionsCollectionImpl options;
-
-  bool required;
-
-  int selectedIndex;
-
-  int size;
-
-  final String type;
-
-  final String validationMessage;
-
-  final _ValidityStateImpl validity;
-
-  String value;
-
-  final bool willValidate;
-
-  void add(_ElementImpl element, _ElementImpl before) native;
-
-  bool checkValidity() native;
-
-  _NodeImpl item(int index) native;
-
-  _NodeImpl namedItem(String name) native;
-
-  void setCustomValidity(String error) native;
-}