move addTile code to the base class (OpenLayers.Layer.Grid). r=crschmidt (closes #2904)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@11575 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Layer/ArcIMS.js

@@ -445,22 +445,5 @@ OpenLayers.Layer.ArcIMS = OpenLayers.Class(OpenLayers.Layer.Grid, {
         return obj;
     },
     
-    /**
-     * Method: addTile
-     * addTile creates a tile, initializes it, and adds it to the layer div. 
-     *
-     * Parameters:
-     * bounds - {<OpenLayers.Bounds>}
-     * position - {<OpenLayers.Pixel>}
-     * 
-     * Returns:
-     * {<OpenLayers.Tile.Image>} The added image tile.
-     */
-    addTile:function(bounds,position) {
-        return new OpenLayers.Tile.Image(
-            this, position, bounds, null, this.tileSize
-        );
-    },
-    
     CLASS_NAME: "OpenLayers.Layer.ArcIMS"
 });