Removed modifications to Array.prototype and moved them into OL.Util instead. All tests pass.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@1590 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Map.js

@@ -327,7 +327,7 @@ OpenLayers.Map.prototype = {
             this.layerContainerDiv.removeChild(layer.div);
         }
         layer.map = null;
-        this.layers.remove(layer);
+        OpenLayers.Util.removeItem(this.layers, layer);
 
         // if we removed the base layer, need to set a new one
         if (this.baseLayer == layer) {
@@ -432,7 +432,7 @@ OpenLayers.Map.prototype = {
     * @param {OpenLayers.Popup} popup
     */
     removePopup: function(popup) {
-        this.popups.remove(popup);
+        OpenLayers.Util.removeItem(this.popups, popup);
         if (popup.div) {
             try { this.layerContainerDiv.removeChild(popup.div); }
             catch (e) { } // Popups sometimes apparently get disconnected