As discussed in the dev chat before, just writing down so that we don't forget

• Remove insert/replace_bot. Remove corresponding notes and instead leave a not saying that bot instances should not be serialized and instead persistence.bot may be used to re-insert bots into data.
• Use pickle.Un/Pickler to do the above for PicklePersistence - mock up at https://nekobin.com/lifojagumo.py
• Make sure that deepcopy(TelegramObject) keep the bot instance - add note about that to documentation
• Make sure that pickle.dumps(TelegramObject) ignores the bot instance - add note about that to documentation

Reference for developers: we had discussions in this eg here and up