delete
Delete an item (post) from a specific channel.
This method allows you to delete a specific item (post) from the provided channel. Once deleted, the item is permanently removed and cannot be retrieved.
Return
A RainbowResult indicating the success or failure of the operation. If successful, it returns Unit. In case of failure, it contains error details.
Parameters
channel
The String representing the ID of the channel where the item is located.
item
The String representing the ID of the item (post) to delete.