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/MapServer.js

@@ -76,22 +76,6 @@ OpenLayers.Layer.MapServer = OpenLayers.Class(OpenLayers.Layer.Grid, {
 
         return obj;
     },
-
-    /**
-     * Method: 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 OpenLayers.Tile.Image
-     */
-    addTile:function(bounds,position) {
-        return new OpenLayers.Tile.Image(this, position, bounds, 
-                                         null, this.tileSize);
-    },
     
     /**
      * Method: getURL