Deleting content via the REST API is very simple. All that is necessary is make a DELETE request to the URI of the entity. So, to delete the node we have just created would require a DELETE request to /node/10. To test this using cURL you would make the following request:

curl --include --request DELETE --user myusername:mypassword http://localhost/node/[nid] 

You do not need to add either the _format query attribute or provide the Content-Type header since there is no data sent and no serialization necessary. If the request is successful, you will receive a 204 Completed response.