test: remove internet/test-tls-connnect-cnnic

Shigeki Ohtsu points out that the test is unreliable because some of
the www1.cnnnic.cn servers are misconfigured.  Remove it.

PR-URL: nodejs#7363
Refs: nodejs#7363 (comment)
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>