replaced calls to addX and addY with calls to add. Simplify

git-svn-id: http://svn.openlayers.org/trunk/openlayers@51 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Util.js

@@ -79,29 +79,6 @@ OpenLayers.Pixel.prototype = {
         return ((d.w==0) && (d.h==0));
     },
 
-
-    /** Return a new Pixel with this pixel's x&y augmented by 
-    *    the Size value passed in.
-    * 
-    * @param {int} w
-    * 
-    * @return {OpenLayers.Pixel}
-    */
-    addX:function(w) {
-        return new OpenLayers.Pixel(this.x+w, this.y);
-    },
-
-    /** Return a new Pixel with this pixel's y augmented by 
-    *    the int value passed in.
-    * 
-    * @param {int} h
-    * 
-    * @return {OpenLayers.Pixel}
-    */
-    addY:function(h) {
-        return new OpenLayers.Pixel(this.x, this.y+h);
-    },
-
     /** Return a new Pixel with this pixel's x&y augmented by 
     *    the int values passed in.
     *