this part does not seem to be used anymore in the patch

lib/OpenLayers/Protocol.js

@@ -235,14 +235,6 @@ OpenLayers.Protocol.Response = OpenLayers.Class({
      */
     features: null,
 
-    /**
-     * Property: data
-     * The data returned in the response by the server.
-     * FIXME : as far as the response doesn't necessary transport features
-     *     it may be helpful to store some non-specific data. 
-     */
-    data: null,
-
     /**
      * Property: reqFeatures
      * {Array({<OpenLayers.Feature.Vector>})} or {<OpenLayers.Feature.Vector>}