Need method to remove item from pool

[MidnightLady]

Technically, connection or channel pool can reconnect itself.
However, sometime channel can be closed for several issues.

async with channel_pool.acquire() as channel:
      queue = await channel.declare_queue('queue_name', arguments={**kwargs}, passive=True)

If queue doesn't exist or precondition failed, channel will be closed as a result. We can't use this channel and pool can't reconnect too.

The pool still keep this item, we can overwrite put method :

class ChannelPool(Pool):
    def put(self, item):
        if hasattr(item, 'is_closed') and item.is_closed:
            return
        super().put(item)

The problem is there is no way to remove in __item_set and __created variable. Name mangling can be work but not recommend.
Since __created = max_size, it won't create new item anymore.