refactor(extra): use delete() if only one message

extra.py

@@ -39,9 +39,13 @@ async def transcript(
         )
         if len(messages) > max_messages:
             try:
-                await message.channel.delete_messages(
+                count = max_messages - min_messages
-                    [messages.pop() for _ in range(max_messages - min_messages)]
+                if count == 1:
-                )
+                    await messages.pop().delete()
+                else:
+                    await message.channel.delete_messages(
+                        [messages.pop() for _ in range(count)]
+                    )
             except Exception:
                 pass