minor: remove clutter null check from pass in config to AvatarFactoryModule.Initialize()

This is never null

OpenSim/Region/Framework/Interfaces/IRegionModule.cs

@@ -35,7 +35,16 @@ namespace OpenSim.Region.Framework.Interfaces
     /// </summary>
     public interface IRegionModule
     {
+        /// <summary>
+        /// Initialize the module.
+        /// </summary>
+        /// <remarks>
+        /// For a shared module this can be called multiple times - once per scene.
+        /// </remarks>
+        /// <param name="scene"></param>
+        /// <param name="source">Configuration information.  For a shared module this will be identical on every scene call</param>
         void Initialise(Scene scene, IConfigSource source);
+        
         void PostInitialise();
         void Close();
         string Name { get; }