Remove generated directories with 100s of files.

client/html/generated/html/frog/DOMSelection.dart

Index: client/html/generated/html/frog/DOMSelection.dart
diff --git a/client/html/generated/html/frog/DOMSelection.dart b/client/html/generated/html/frog/DOMSelection.dart
deleted file mode 100644
index 0c26085ea76a103a44b91135ed07360872718758..0000000000000000000000000000000000000000
--- a/client/html/generated/html/frog/DOMSelection.dart
+++ /dev/null
@@ -1,55 +0,0 @@
-
-class _DOMSelectionImpl implements DOMSelection native "*DOMSelection" {
-
-  final _NodeImpl anchorNode;
-
-  final int anchorOffset;
-
-  final _NodeImpl baseNode;
-
-  final int baseOffset;
-
-  final _NodeImpl extentNode;
-
-  final int extentOffset;
-
-  final _NodeImpl focusNode;
-
-  final int focusOffset;
-
-  final bool isCollapsed;
-
-  final int rangeCount;
-
-  final String type;
-
-  void addRange(_RangeImpl range) native;
-
-  void collapse(_NodeImpl node, int index) native;
-
-  void collapseToEnd() native;
-
-  void collapseToStart() native;
-
-  bool containsNode(_NodeImpl node, bool allowPartial) native;
-
-  void deleteFromDocument() native;
-
-  void empty() native;
-
-  void extend(_NodeImpl node, int offset) native;
-
-  _RangeImpl getRangeAt(int index) native;
-
-  void modify(String alter, String direction, String granularity) native;
-
-  void removeAllRanges() native;
-
-  void selectAllChildren(_NodeImpl node) native;
-
-  void setBaseAndExtent(_NodeImpl baseNode, int baseOffset, _NodeImpl extentNode, int extentOffset) native;
-
-  void setPosition(_NodeImpl node, int offset) native;
-
-  String toString() native;
-}