markpages: Get rid of PageWithTalkPageGenerator

Since redfam.article_generator can yield talkpage with additional
information about redfam and current article from db, we do not need it
anymore.

Related Task: [FS#161](https://fs.golderweb.de/index.php?do=details&task_id=161)

bots/markpages.py

@@ -145,14 +145,10 @@ class MarkPagesBot( CurrentPageBot ):  # sets 'current_page' on each treat()
         for redfam in self.redfams:
 
             # We need the talkpage (and only this) of each existing page
-            for talkpage in pagegenerators.PageWithTalkPageGenerator(
+            for talkpage in redfam.article_generator(
-                    redfam.article_generator(
                     filter_existing=True,
-                        exclude_article_status=["marked"] ),
+                    exclude_article_status=["marked"],
-                    return_talk_only=True ):
+                    talkpages=True ):
-
-                # Add reference to redfam to talkpages
-                talkpage.redfam = redfam
 
                 yield talkpage