Wierd behaviour of different `deserialize_guild_..._thread` functions

[rayakame]

The three functions

deserialize_guild_news_thread, deserialize_guild_public_thread, deserialize_guild_private_thread

all use a parameter user_id in their impl, but its not specified in the abstract base class.

I feel like a type checker should error here idk.

I want to take a closer look at this, I'm opening this issue so that I do not forget about it and maybe someone else knows why this is done the way its done.