Function delete_chat_background 

pub async fn delete_chat_background(
    chat_id: i64,
    restore_previous: bool,
    client_id: i32,
) -> Result<(), Error>

Deletes background in a specific chat

Arguments

• chat_id - Chat identifier
• restore_previous - Pass true to restore previously set background. Can be used only in private and secret chats with non-deleted users if userFullInfo.set_chat_background == true. Supposed to be used from messageChatSetBackground messages with the currently set background that was set for both sides by the other user
• client_id - The client id to send the request to