OpenStack-Chef apparently has not been meeting on IRC since
4/2018. Let's clean up the agenda slot so that we don't
give out the impression that it actually does, and encourage
other ways to reach out to the team.
Change-Id: I21cf41d85c9237dd9415b247cfe3f2c2362d5a55
Chef OpenStack previously held a slot for a weekly meeting in a shared
meeting channel, but dropped it in favor of office hours on an as-needed
basis. This change is to record the information about the times and
location.
Change-Id: I3b139893545e88ef456387fa38f62ce119c3fc21