Removing dart:html APIs which were deprecated in M2.

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

Index: tools/dom/templates/html/impl/impl_SVGElement.darttemplate
diff --git a/tools/dom/templates/html/impl/impl_SVGElement.darttemplate b/tools/dom/templates/html/impl/impl_SVGElement.darttemplate
index 0fbdacb9d77ebdf7343d0f52ef694ec203cf8245..d57a8b823feaa40adafe3f923e448f54734fb2de 100644
--- a/tools/dom/templates/html/impl/impl_SVGElement.darttemplate
+++ b/tools/dom/templates/html/impl/impl_SVGElement.darttemplate
@@ -45,16 +45,6 @@ $(ANNOTATIONS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
     return _cssClassSet;
   }
 
-  @deprecated
-  List<Element> get elements => new FilteredElementList(this);
-
-  @deprecated
-  void set elements(Collection<Element> value) {
-    final elements = this.elements;
-    elements.clear();
-    elements.addAll(value);
-  }
-
   List<Element> get children => new FilteredElementList(this);
 
   void set children(List<Element> value) {