Revert "Rework Element constructors"

lib/dom/templates/html/frog/factoryprovider__Elements.darttemplate

Index: lib/dom/templates/html/frog/factoryprovider__Elements.darttemplate
diff --git a/lib/dom/templates/html/frog/factoryprovider__Elements.darttemplate b/lib/dom/templates/html/frog/factoryprovider__Elements.darttemplate
deleted file mode 100644
index 8fe27e5ec9af8b33cb8309b454ddf7a67107b834..0000000000000000000000000000000000000000
--- a/lib/dom/templates/html/frog/factoryprovider__Elements.darttemplate
+++ /dev/null
@@ -1,7 +0,0 @@
-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-class _Elements {
-
-$!FACTORY_METHODS}