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 <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Sakthipriyan Vairamani <[email protected]>

Author: bnoordhuis