...
See REST Web Service Adaptor for general instructions on how to modify the URL resource (request string), query parameters, request headers, and response headers.
The Web Service DELETE method issues an HTTP DELETE method on the specified endpoint (as set via the specified connection).
To create a Web Service DELETE method, it is mendetory to create a Web Service Connection first.
Choose the Adaptor Connection from the drop-down menu and then chose choose DELETE from the Method drop-down.