Revert "Dartium w/ JsInterop enabled"

tools/dom/templates/html/impl/impl_HTMLFrameSetElement.darttemplate

Index: tools/dom/templates/html/impl/impl_HTMLFrameSetElement.darttemplate
diff --git a/tools/dom/templates/html/impl/impl_HTMLFrameSetElement.darttemplate b/tools/dom/templates/html/impl/impl_HTMLFrameSetElement.darttemplate
deleted file mode 100644
index 88b5bcb6a29641a1291b74268df674da55ea3389..0000000000000000000000000000000000000000
--- a/tools/dom/templates/html/impl/impl_HTMLFrameSetElement.darttemplate
+++ /dev/null
@@ -1,21 +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.
-
-part of $LIBRARYNAME;
-
-@DocsEditable()
-$(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS {
-$!MEMBERS
-$if DARTIUM
-  // Override these methods for Dartium _HTMLFrameSetElement can't be abstract.
-  Stream<Event> get onHashChange => hashChangeEvent.forTarget(this);
-  Stream<MessageEvent> get onMessage => messageEvent.forTarget(this);
-  Stream<Event> get onOffline => offlineEvent.forTarget(this);
-  Stream<Event> get onOnline => onlineEvent.forTarget(this);
-  Stream<PopStateEvent> get onPopState => popStateEvent.forTarget(this);
-  Stream<StorageEvent> get onStorage => storageEvent.forTarget(this);
-  Stream<Event> get onUnload => unloadEvent.forTarget(this);
-$endif
-}
-