test: remove disabled tls_server.js

Remove tls_server.js that has been disabled for about 6 years. It
appears to have worked in concert with some other file which has since
been removed. It seems to create a server and set up a bunch of
listeners, but it does not appear to have code that connects to the
server and triggers any of those listeners.

PR-URL: #12275
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Alexey Orlenko <eaglexrlnk@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>