unusedfiles: remove Flow support

flow support did never work with template substitution.
Anyway flow support is to be dropped and there is no need to fix it.
Flow talk page is only found in urwiki recently

Bug: T372477
Change-Id: Icf51219ff7125ea3298f3f012a2540ec79aa3173

scripts/unusedfiles.py

@@ -18,7 +18,7 @@
 -usertemplate:  Use a custom template to warn the uploader.
 """
 #
-# (C) Pywikibot team, 2007-2022
+# (C) Pywikibot team, 2007-2024
 #
 # Distributed under the terms of the MIT license.
 #
@@ -35,7 +35,6 @@
     SingleSiteBot,
 )
 from pywikibot.exceptions import Error, NoPageError, TranslationError
-from pywikibot.flow import Board
 
 
 template_to_the_image = {
@@ -108,30 +107,39 @@ def __init__(self, **kwargs) -> None:
                 f'This script is not localized for {self.site} site;\n'
                 'try using -filetemplate:<template name>.')
 
+    def skip_page(self, image: pywikibot.page.FilePage) -> bool:
+        """Skip processing on repository images or if image is already tagged.
+
+        Use get_file_url() and file_is_shared() to confirm it is local
+        media rather than a local page with the same name as shared
+        media.
+        """
+        if not image.get_file_url() or image.file_is_shared() \
+           or 'http://' in image.text:
+            return True
+
+        if self.opt.filetemplate in image.text:
+            pywikibot.info(f'{image} done already')
+            return True
+
+        return super().skip_page(image)
+
     def treat(self, image) -> None:
         """Process one image page."""
-        # Use get_file_url() and file_is_shared() to confirm it is local media
-        # rather than a local page with the same name as shared media.
-        if (image.get_file_url() and not image.file_is_shared()
-                and 'http://' not in image.text):
-            if self.opt.filetemplate in image.text:
-                pywikibot.info(f'{image} done already')
-                return
-
-            self.append_text(image, '\n\n' + self.opt.filetemplate)
-            if self.opt.nouserwarning:
-                return
-
-            uploader = image.oldest_file_info.user
-            user = pywikibot.User(image.site, uploader)
-            usertalkpage = user.getUserTalkPage()
-            template2uploader = self.opt.usertemplate \
-                % {'title': image.title()}
-            msg2uploader = self.site.expand_text(template2uploader)
-            if usertalkpage.is_flow_page():
-                self.post_to_flow_board(usertalkpage, msg2uploader)
-            else:
-                self.append_text(usertalkpage, '\n\n' + msg2uploader + ' ~~~~')
+        self.append_text(image, '\n\n' + self.opt.filetemplate)
+
+        if self.opt.nouserwarning:
+            return
+
+        uploader = image.oldest_file_info.user
+        user = pywikibot.User(image.site, uploader)
+        usertalkpage = user.getUserTalkPage()
+        msg2uploader = self.opt.usertemplate % {'title': image.title()}
+        if usertalkpage.is_flow_page():
+            pywikibot.warning(f'Unsupported Flow talkpage {usertalkpage};'
+                              '\n         uploader cannot be informed.')
+        else:
+            self.append_text(usertalkpage, '\n\n' + msg2uploader + ' ~~~~')
 
     def append_text(self, page, apptext):
         """Append apptext to the page."""
@@ -149,15 +157,6 @@ def append_text(self, page, apptext):
         self.current_page = page
         self.put_current(text)
 
-    @staticmethod
-    def post_to_flow_board(page, post) -> None:
-        """Post message as a Flow topic."""
-        board = Board(page)
-        header, rest = post.split('\n', 1)
-        title = header.strip('=')
-        content = rest.lstrip()
-        board.new_topic(title, content)
-
 
 def main(*args: str) -> None:
     """