Scheduled Posts Remove Channels Route

Remove channels from the given scheduled posts. It is assumed that the keys of payload.channel_ids (a dict) represent the channel IDs to remove. For each scheduled post ID in payload.scheduled_post_ids, the endpoint first retrieves the scheduled post. It then computes what the 'channel_ids_for_form' field would be after removing the specified channels. If removal would result in an empty list (i.e. leave the post without any channels), the removal for that post is ignored.