Remove Technical committee office hours

Technical Committee has removed the office hours
in favor of weekly meeting

- https://review.opendev.org/c/openstack/governance/+/817493

Updating the irc meeting doc accordingly.

Change-Id: I837f6cc0546c67f6579cd3ca4e036957580846e5

meetings/technical-committee-office-hours.yaml

@@ -1,21 +0,0 @@
-project:  Technical Committee Office hours
-meeting_id: tc
-schedule:
-  - time:       '0100'
-    day:        Tuesday
-    irc:        openstack-tc
-    frequency:  weekly
-    start_date: 20170616
-chair:  Ghanshyam Mann (gmann)
-description:  >
-  The OpenStack Technical Committee is one of the governing bodies of the
-  OpenStack project. It is an elected group that represents the
-  contributors to the project, and has oversight on all technical matters.
-  The Technical Committee is formally defined in the OpenStack Foundation
-  bylaws and further refined in the Technical Committee charter.
-
-  Office hours are an informal time for general discussion without a
-  pre-planned agenda. Anyone may raise issues to the TC in
-  #openstack-tc or via the mailing list at any point, but office hours
-  are times when TC members try to be online and available for
-  informal synchronous discussions.