Removed placeholder comment for import/export functionality

For six years, we've been carrying around this commented out placeholder for a `Load()` method that would handle importing topics from an `XmlDocument` in order to support import capabilities. We shouldn't maintain commented out placeholder code like this to begin with. But, in addition, it's no longer relevant as we've implemented a import capabilities via the new **OnTopic-Data-Transfer** library—which is also a much more elegant and flexible approach. Good riddance!

Author: JeremyCaney

OnTopic/Repositories/ITopicRepository.cs

@@ -74,21 +74,6 @@ public interface ITopicRepository {
     /// <returns>A topic object.</returns>
     Topic? Load(int topicId, DateTime version);
 
-    /*==========================================================================================================================
-    | ###TODO JJC080314: An overload to Load() should be created to accept an XmlDocument or XmlNode based on the proposed
-    | Import/Export schema.
-    >---------------------------------------------------------------------------------------------------------------------------
-    | ###NOTE JJC080313: If the topic already exists, return the existing node, by calling its Merge() function. Otherwise,
-    | construct a new node using its XmlNode constructor.
-    >---------------------------------------------------------------------------------------------------------------------------
-      public static Topic Load(XmlNode node, ImportStrategy importStrategy = ImportStrategy.Merge) {
-      //Process XML
-      //Construct children objects
-      //###NOTE JJC080314: May need to cross-reference with Load() and/or TopicRepository to validate against whatever objects
-      //are already created and available.
-      }
-    \-------------------------------------------------------------------------------------------------------------------------*/
-
     /*==========================================================================================================================
     | METHOD: ROLLBACK
     \-------------------------------------------------------------------------------------------------------------------------*/