Comment 4 for bug 1602410

Reviewed: https://review.openstack.org/376978
Committed: https://git.openstack.org/cgit/openstack/ironic/commit/?id=7dc74ab75478318afc5c933472423f4c77eb662d
Submitter: Jenkins
Branch: master

commit 7dc74ab75478318afc5c933472423f4c77eb662d
Author: Mario Villaplana <email address hidden>
Date: Mon Sep 26 17:48:58 2016 +0000

    Remove "agent_last_heartbeat" internal field from agent drivers

    "agent_last_heartbeat" in the driver_internal_info dict of agent drivers is not
    used anywhere by ironic itself, except for logging purposes. This
    removes it.

    Change-Id: Ic198f6a952ed135099bcc525ef548a4aea005056
    Closes-Bug: 1602410