Remove generated directories with 100s of files.

client/html/generated/html/dartium/TableSectionElement.dart

Index: client/html/generated/html/dartium/TableSectionElement.dart
diff --git a/client/html/generated/html/dartium/TableSectionElement.dart b/client/html/generated/html/dartium/TableSectionElement.dart
deleted file mode 100644
index 6bf4fe74e9cacf367bcc6cba36fd35a1d365323a..0000000000000000000000000000000000000000
--- a/client/html/generated/html/dartium/TableSectionElement.dart
+++ /dev/null
@@ -1,31 +0,0 @@
-
-class _TableSectionElementImpl extends _ElementImpl implements TableSectionElement {
-  _TableSectionElementImpl._wrap(ptr) : super._wrap(ptr);
-
-  String get align() => _wrap(_ptr.align);
-
-  void set align(String value) { _ptr.align = _unwrap(value); }
-
-  String get ch() => _wrap(_ptr.ch);
-
-  void set ch(String value) { _ptr.ch = _unwrap(value); }
-
-  String get chOff() => _wrap(_ptr.chOff);
-
-  void set chOff(String value) { _ptr.chOff = _unwrap(value); }
-
-  HTMLCollection get rows() => _wrap(_ptr.rows);
-
-  String get vAlign() => _wrap(_ptr.vAlign);
-
-  void set vAlign(String value) { _ptr.vAlign = _unwrap(value); }
-
-  void deleteRow(int index) {
-    _ptr.deleteRow(_unwrap(index));
-    return;
-  }
-
-  Element insertRow(int index) {
-    return _wrap(_ptr.insertRow(_unwrap(index)));
-  }
-}