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/KaMap.js

@@ -94,22 +94,6 @@ OpenLayers.Layer.KaMap = OpenLayers.Class(OpenLayers.Layer.Grid, {
                       });
     },
 
-    /**
-     * Method: addTile
-     * 
-     * Parameters:
-     * bounds - {<OpenLayers.Bounds>}
-     * position - {<OpenLayers.Pixel>}
-     * 
-     * Returns:
-     * {<OpenLayers.Tile.Image>}
-     */    
-    addTile:function(bounds,position) {
-        var url = this.getURL(bounds);
-        return new OpenLayers.Tile.Image(this, position, bounds, 
-                                             url, this.tileSize);
-    },
-
     /** 
      * Method: calculateGridLayout
      * ka-Map uses the center point of the map as an origin for