Remove searching through message history to find threads

Author: kyb3r

core/thread.py

@@ -735,7 +735,7 @@ async def find(
     ) -> Thread:
         """Finds a thread from cache or from discord channel topics."""
         if recipient is None and channel is not None:
-            return await self._find_from_channel(channel)
+            return self._find_from_channel(channel)
 
         thread = None
 
@@ -761,7 +761,7 @@ async def find(
                 thread.ready = True
         return thread
 
-    async def _find_from_channel(self, channel):
+    def _find_from_channel(self, channel):
         """
         Tries to find a thread from a channel channel topic,
         if channel topic doesnt exist for some reason, falls back to
@@ -773,23 +773,6 @@ async def _find_from_channel(self, channel):
         if channel.topic:
             user_id = match_user_id(channel.topic)
 
-        # BUG: When discord fails to create channel topic.
-        # search through message history
-        elif channel.topic is None:
-            try:
-                async for message in channel.history(limit=100):
-                    if message.author != self.bot.user:
-                        continue
-                    if message.embeds:
-                        embed = message.embeds[0]
-                        if embed.footer.text:
-                            user_id = match_user_id(embed.footer.text)
-                            if user_id != -1:
-                                break
-            except discord.NotFound:
-                # When the channel's deleted.
-                pass
-
         if user_id != -1:
             if user_id in self.cache:
                 return self.cache[user_id]