Revert "Reenable debug cli telnet listener"

Please leave the telnet disabled in the packages, as its is not secure on a server deployment and we *should* be secure out of the box.

This reverts commit 9c76c1fc68aaf1140b8d5b8b32fc7552f6381ed3.

https://gerrit.fd.io/r/#/c/102/

Change-Id: I0187375441b4a6dd508424d687f380bbfc485259
Signed-off-by: Ed Warnicke <eaw@cisco.com>