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/TileCache.js

@@ -144,23 +144,6 @@ OpenLayers.Layer.TileCache = OpenLayers.Class(OpenLayers.Layer.Grid, {
         url = (url.charAt(url.length - 1) == '/') ? url : url + '/';
         return url + path;
     },
-
-    /**
-     * Method: addTile
-     * Create a tile, initialize it, and add it to the layer div. 
-     *
-     * Parameters: 
-     * bounds - {<OpenLayers.Bounds>} 
-     * position - {<OpenLayers.Pixel>}
-     *
-     * Returns:
-     * {<OpenLayers.Tile.Image>} The added <OpenLayers.Tile.Image>
-     */
-    addTile:function(bounds, position) {
-        var url = this.getURL(bounds);
-        return new OpenLayers.Tile.Image(this, position, bounds, 
-                                             url, this.tileSize);
-    },
     
     CLASS_NAME: "OpenLayers.Layer.TileCache"
 });