remove unused getTile() method and related tests

git-svn-id: http://svn.openlayers.org/branches/openlayers/2.0@1287 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Layer/Grid.js

@@ -88,30 +88,6 @@ OpenLayers.Layer.Grid.prototype =
         }
     },
 
-    /** 
-     * @param {String} tileID
-     * 
-     * @returns The OpenLayers.Tile with the corresponding ID from the grid.
-     *           if no tile is found, returns null
-     * @type OpenLayers.Tile
-     */
-    getTile: function(tileID) {
-        var foundTile = null;
-        if (this.grid) {
-
-            for(var iRow = 0; iRow < this.grid.length; iRow++) {
-                var row = this.grid[iRow];
-                for(var iCol = 0; iCol < row.length; iCol++) {
-                    var tile = row[iCol];
-                    if (tile.id == tileID) {
-                        foundTile = tile;
-                    }
-                }
-            }
-        }
-        return foundTile;
-    },
-
     /** This function is called whenever the map is moved. All the moving
      * of actual 'tiles' is done by the map, but moveTo's role is to accept
      * a bounds and make sure the data that that bounds requires is pre-loaded.