test: remove util properties from common

common does not need util properties anymore. Remove them.

PR-URL: https://github.com/nodejs/node/pull/3304


Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: Brendan Ashworth <brendan.ashworth@me.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>