diff --git a/‎src/standard/x-styling.html‎
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@@ -18,7 +18,6 @@
     var serializeValueToAttribute = Polymer.Base.serializeValueToAttribute;
 
     var propertyUtils = Polymer.StyleProperties;
-    var styleUtil = Polymer.StyleUtil;
     var styleTransformer = Polymer.StyleTransformer;
     var styleDefaults = Polymer.StyleDefaults;