Summary

When a channel is deleted, any threads in that channel will remain in guild.threads

Reproduction Steps

1. Create a thread in a channel
2. See that the thread is in guild.threads
3. Delete the channel containing the thread
4. See that the thread is still in guild.threads

Minimal Reproducible Code

import asyncio
channel = await guild.create_text_channel("random-channel")
thread = await channel.create_thread(name="my-thread")
print(thread in guild.threads)
await channel.delete()
await asyncio.sleep(3)
print(thread in guild.threads)

Expected Results

True
False

Actual Results

True
True

Intents

All apart from these: presences, invites, webhooks, integrations, and dm typing/reactions

System Information

- Python v3.12.1-final
- discord.py v2.3.2-final
- aiohttp v3.9.4

Checklist

• I have searched the open issues for duplicates.
• I have shown the entire traceback, if possible.
• I have removed my token from display, if visible.

Additional Context

No response