test: delete obsolete test-sendfd.js

This test was disabled in 2011 and is no longer useful without
modifications.

PR-URL: #14334
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>

Author: decareano