Remove unused merger:update task

This task is no longer used and was the last thing that merger claimed
to do that executor did not. Now what merger does is a subset of
executor, thus merger can scale out to handle things that leave the
executor(s) free to focus on running jobs.

Change-Id: Ibc8638cf7c2109d9b32c27fb98fb84605f5d5ac0
Signed-off-by: Jesse Keating <omgjlk@us.ibm.com>
2 files changed