204
2xx SuccessNo Content
The request succeeded but there is no content to send back.
204 No Content means the request worked but there's deliberately nothing in the body. It's common after a successful DELETE, or for a PUT that doesn't need to echo data back. Clients should not expect a body and shouldn't try to parse one.
About 2xx Success
The request was received, understood, and accepted. This is what you want to see.