Cleaning up some unused code.

sdk/lib/html/templates/html/impl/impl_Element.darttemplate

Index: sdk/lib/html/templates/html/impl/impl_Element.darttemplate
diff --git a/sdk/lib/html/templates/html/impl/impl_Element.darttemplate b/sdk/lib/html/templates/html/impl/impl_Element.darttemplate
index be0bbc83e486eaa3e6dd279c9e1a9c4459ebea1c..7899940994ce8c5410ff39dcb363a37e14bd7e6a 100644
--- a/sdk/lib/html/templates/html/impl/impl_Element.darttemplate
+++ b/sdk/lib/html/templates/html/impl/impl_Element.darttemplate
@@ -326,24 +326,6 @@ class _ElementCssClassSet extends CssClassSet {
   }
 }
 
-class _SimpleClientRect implements ClientRect {
-  final num left;
-  final num top;
-  final num width;
-  final num height;
-  num get right => left + width;
-  num get bottom => top + height;
-
-  const _SimpleClientRect(this.left, this.top, this.width, this.height);
-
-  bool operator ==(ClientRect other) {
-    return other != null && left == other.left && top == other.top
-        && width == other.width && height == other.height;
-  }
-
-  String toString() => "($left, $top, $width, $height)";
-}
-
 abstract class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
 
   factory $CLASSNAME.html(String html) =>