Remove generated directories with 100s of files.

client/html/generated/html/dartium/XPathResult.dart

Index: client/html/generated/html/dartium/XPathResult.dart
diff --git a/client/html/generated/html/dartium/XPathResult.dart b/client/html/generated/html/dartium/XPathResult.dart
deleted file mode 100644
index 12cfb28c85d8e1dc108d48a89ac4f0f258f3adf2..0000000000000000000000000000000000000000
--- a/client/html/generated/html/dartium/XPathResult.dart
+++ /dev/null
@@ -1,26 +0,0 @@
-
-class _XPathResultImpl extends _DOMTypeBase implements XPathResult {
-  _XPathResultImpl._wrap(ptr) : super._wrap(ptr);
-
-  bool get booleanValue() => _wrap(_ptr.booleanValue);
-
-  bool get invalidIteratorState() => _wrap(_ptr.invalidIteratorState);
-
-  num get numberValue() => _wrap(_ptr.numberValue);
-
-  int get resultType() => _wrap(_ptr.resultType);
-
-  Node get singleNodeValue() => _wrap(_ptr.singleNodeValue);
-
-  int get snapshotLength() => _wrap(_ptr.snapshotLength);
-
-  String get stringValue() => _wrap(_ptr.stringValue);
-
-  Node iterateNext() {
-    return _wrap(_ptr.iterateNext());
-  }
-
-  Node snapshotItem(int index) {
-    return _wrap(_ptr.snapshotItem(_unwrap(index)));
-  }
-}