Set opacity on layer div, not on tiles and markers. r=fredj (closes #3431)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@12185 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Layer/WFS.js

@@ -590,21 +590,5 @@ OpenLayers.Layer.WFS = OpenLayers.Class(
         return extent;
     },
     
-    /** 
-     * APIMethod: setOpacity 
-     * Call the setOpacity method of the appropriate parent class to set the
-     *     opacity.  
-     * 
-     * Parameter: 
-     * opacity - {Float} 
-     */
-    setOpacity: function (opacity) {
-        if (this.vectorMode) {
-            OpenLayers.Layer.Vector.prototype.setOpacity.apply(this, [opacity]);
-        } else {
-            OpenLayers.Layer.Markers.prototype.setOpacity.apply(this, [opacity]);
-        }    
-    },
-
     CLASS_NAME: "OpenLayers.Layer.WFS"
 });