Remove generated directories with 100s of files.

client/html/generated/html/dartium/CharacterData.dart

Index: client/html/generated/html/dartium/CharacterData.dart
diff --git a/client/html/generated/html/dartium/CharacterData.dart b/client/html/generated/html/dartium/CharacterData.dart
deleted file mode 100644
index 9b532c5412cc4af594d5d66b55a011929d893eca..0000000000000000000000000000000000000000
--- a/client/html/generated/html/dartium/CharacterData.dart
+++ /dev/null
@@ -1,34 +0,0 @@
-
-class _CharacterDataImpl extends _NodeImpl implements CharacterData {
-  _CharacterDataImpl._wrap(ptr) : super._wrap(ptr);
-
-  String get data() => _wrap(_ptr.data);
-
-  void set data(String value) { _ptr.data = _unwrap(value); }
-
-  int get length() => _wrap(_ptr.length);
-
-  void appendData(String data) {
-    _ptr.appendData(_unwrap(data));
-    return;
-  }
-
-  void deleteData(int offset, int length) {
-    _ptr.deleteData(_unwrap(offset), _unwrap(length));
-    return;
-  }
-
-  void insertData(int offset, String data) {
-    _ptr.insertData(_unwrap(offset), _unwrap(data));
-    return;
-  }
-
-  void replaceData(int offset, int length, String data) {
-    _ptr.replaceData(_unwrap(offset), _unwrap(length), _unwrap(data));
-    return;
-  }
-
-  String substringData(int offset, int length) {
-    return _wrap(_ptr.substringData(_unwrap(offset), _unwrap(length)));
-  }
-}