lib: remove the invalid command line options

The option --remote_debugging_server and --debug-agent are
not supported now.

PR-URL: https://github.com/nodejs/node/pull/13764


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>