Remove generated directories with 100s of files.

client/html/generated/html/dartium/SVGLengthList.dart

Index: client/html/generated/html/dartium/SVGLengthList.dart
diff --git a/client/html/generated/html/dartium/SVGLengthList.dart b/client/html/generated/html/dartium/SVGLengthList.dart
deleted file mode 100644
index 50fdd9ef7176f13e81f2a68199aca236050cb7fa..0000000000000000000000000000000000000000
--- a/client/html/generated/html/dartium/SVGLengthList.dart
+++ /dev/null
@@ -1,35 +0,0 @@
-
-class _SVGLengthListImpl extends _DOMTypeBase implements SVGLengthList {
-  _SVGLengthListImpl._wrap(ptr) : super._wrap(ptr);
-
-  int get numberOfItems() => _wrap(_ptr.numberOfItems);
-
-  SVGLength appendItem(SVGLength item) {
-    return _wrap(_ptr.appendItem(_unwrap(item)));
-  }
-
-  void clear() {
-    _ptr.clear();
-    return;
-  }
-
-  SVGLength getItem(int index) {
-    return _wrap(_ptr.getItem(_unwrap(index)));
-  }
-
-  SVGLength initialize(SVGLength item) {
-    return _wrap(_ptr.initialize(_unwrap(item)));
-  }
-
-  SVGLength insertItemBefore(SVGLength item, int index) {
-    return _wrap(_ptr.insertItemBefore(_unwrap(item), _unwrap(index)));
-  }
-
-  SVGLength removeItem(int index) {
-    return _wrap(_ptr.removeItem(_unwrap(index)));
-  }
-
-  SVGLength replaceItem(SVGLength item, int index) {
-    return _wrap(_ptr.replaceItem(_unwrap(item), _unwrap(index)));
-  }
-}