Remove generated directories with 100s of files.

client/html/generated/html/dartium/HTMLAllCollection.dart

Index: client/html/generated/html/dartium/HTMLAllCollection.dart
diff --git a/client/html/generated/html/dartium/HTMLAllCollection.dart b/client/html/generated/html/dartium/HTMLAllCollection.dart
deleted file mode 100644
index 21ebccc7d627112e6e71624df4250e5fbc785d97..0000000000000000000000000000000000000000
--- a/client/html/generated/html/dartium/HTMLAllCollection.dart
+++ /dev/null
@@ -1,18 +0,0 @@
-
-class _HTMLAllCollectionImpl extends _DOMTypeBase implements HTMLAllCollection {
-  _HTMLAllCollectionImpl._wrap(ptr) : super._wrap(ptr);
-
-  int get length() => _wrap(_ptr.length);
-
-  Node item(int index) {
-    return _wrap(_ptr.item(_unwrap(index)));
-  }
-
-  Node namedItem(String name) {
-    return _wrap(_ptr.namedItem(_unwrap(name)));
-  }
-
-  NodeList tags(String name) {
-    return _wrap(_ptr.tags(_unwrap(name)));
-  }
-}