Removing no longer needed code.

Thanks @elemoine for catching the IE6 reflow in Tile/Image.js.

lib/OpenLayers/Layer/Grid.js

@@ -651,17 +651,6 @@ OpenLayers.Layer.Grid = OpenLayers.Class(OpenLayers.Layer.HTTPRequest, {
             this.map.getZoomForResolution(resolution) + (this.zoomOffset || 0);
     },
 
-    /**
-     * Method: getResolutionScale
-     * Return the value by which the layer is currently scaled.
-     *
-     * Returns:
-     * {Number} The resolution scale.
-     */
-    getResolutionScale: function() {
-        return parseInt(this.div.style.width, 10) / 100;
-    },
-
     /**
      * Method: applyBackBuffer
      * Create, insert, scale and position a back buffer for the layer.

lib/OpenLayers/Tile/Image.js

@@ -416,20 +416,6 @@ OpenLayers.Tile.Image = OpenLayers.Class(OpenLayers.Tile, {
         this.canvasContext = null;
         this.events.triggerEvent("loadend");
 
-        // IE<7 needs a reflow when the tiles are loaded because of the
-        // percentage based positioning. Otherwise nothing is shown
-        // until the user interacts with the map in some way.
-        if (parseFloat(navigator.appVersion.split("MSIE")[1]) < 7 &&
-                this.layer && this.layer.div) {
-            var span = document.createElement("span");
-            span.style.display = "none";
-            var layerDiv = this.layer.div;
-            layerDiv.appendChild(span);
-            window.setTimeout(function() {
-                span.parentNode === layerDiv && span.parentNode.removeChild(span);
-            }, 0);
-        }
-
         if (this.layerAlphaHack === true) {
             img.style.filter =
                 "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" +