Remove a couple of stale nova meetings

* The bugs meeting no longer has an owner and there
  hasn't been one since April 2017.

* The last hyper-v meeting was in May 2017. Before
  that there wasn't much activity either.

Change-Id: If7eef2c8086871027a6cae40b4b0d2e09b9f9869

meetings/nova-bugs-team-meeting.yaml

@@ -1,19 +0,0 @@
-project:  Nova Bugs Team Meeting
-meeting_id: nova-bugs-team
-agenda_url: https://wiki.openstack.org/wiki/Meetings/Nova/BugsTeam
-schedule:
-  - time:       '0800'
-    day:        Tuesday
-    irc:        openstack-meeting-4
-    frequency:  biweekly-odd
-    start_date: 20160607
-  - time:       '1800'
-    day:        Tuesday
-    irc:        openstack-meeting-4
-    frequency:  biweekly-even
-    start_date: 20160216
-chair:  Augustina Ragwitz (auggy)
-description:  >
-  This is the weekly Nova Bugs Team meeting to maintain Nova's bug list.
-  The mission, scope and agenda of this meeting are available at
-  https://wiki.openstack.org/wiki/Meetings/Nova/BugsTeam

meetings/nova-hyper-v-team-meeting.yaml

@@ -1,11 +0,0 @@
-project:  Nova Hyper-V Team Meeting
-meeting_id: hyper-v
-schedule:
-  - time:       '1300'
-    day:        Wednesday
-    irc:        openstack-meeting-3
-    frequency:  weekly
-    start_date: 20160106
-chair:  Claudiu Belu (claudiub)
-description:  >
-  This is the Hyper-V meeting.