Remove generated directories with 100s of files.

client/html/generated/html/dartium/ProgressElement.dart

Index: client/html/generated/html/dartium/ProgressElement.dart
diff --git a/client/html/generated/html/dartium/ProgressElement.dart b/client/html/generated/html/dartium/ProgressElement.dart
deleted file mode 100644
index 643442a32441c748a452f7a7ea458e27e0b7503f..0000000000000000000000000000000000000000
--- a/client/html/generated/html/dartium/ProgressElement.dart
+++ /dev/null
@@ -1,18 +0,0 @@
-
-class _ProgressElementImpl extends _ElementImpl implements ProgressElement {
-  _ProgressElementImpl._wrap(ptr) : super._wrap(ptr);
-
-  FormElement get form() => _wrap(_ptr.form);
-
-  NodeList get labels() => _wrap(_ptr.labels);
-
-  num get max() => _wrap(_ptr.max);
-
-  void set max(num value) { _ptr.max = _unwrap(value); }
-
-  num get position() => _wrap(_ptr.position);
-
-  num get value() => _wrap(_ptr.value);
-
-  void set value(num value) { _ptr.value = _unwrap(value); }
-}