Remove nb_unread/nb_messages in CapMessages

Most backends don't set it nb_messages and no application used it.
No backends set nb_unread and only one application tried to use it.

This should help avoid useless fillobj() calls in some cases.

fixes #827

modules/phpbb/backend.py

@@ -72,7 +72,6 @@ class PhpBBBackend(BaseBackend, ICapMessages, ICapMessagesPost):
                 thread = Thread(url2id(link.url))
                 thread.title = ('%s ' % root_link.title if root_link else '') + link.title
                 thread.date = link.date
-                thread.nb_messages = link.nb_messages
                 thread.flags = thread.IS_DISCUSSION
                 yield thread
 

modules/phpbb/pages/forum.py

@@ -39,7 +39,6 @@ class Link(object):
         self.url = url
         self.title = u''
         self.date = None
-        self.nb_messages = 0
 
 class ForumPage(PhpBBPage):
     def iter_links(self):
@@ -63,8 +62,6 @@ class ForumPage(PhpBBPage):
                         continue
                     else:
                         break
-            # it only lists number of answers, so we add 1.
-            link.nb_messages = int(li.cssselect('dd.posts')[0].text.strip()) + 1
             yield link
 
     def iter_all_forums(self):