Cancel Tap as a service meeting

The meeting has not been held for a while.
http://eavesdrop.openstack.org/meetings/taas/2018/
I guess it's better to free up the slot for now.
On-demand ML discussion is more than enough.
We can always revisit if/when the situation changed.

Change-Id: Ic5909f4527d8898ffbdd1f9b14711dfe9d03941c

meetings/taas-meeting.yaml

@@ -1,12 +0,0 @@
-project:  Tap as a Service Meeting
-meeting_id: taas
-agenda_url: https://wiki.openstack.org/wiki/Meetings/taas
-schedule:
-  - time:       '0530'
-    day:        Wednesday
-    irc:        openstack-meeting-3
-    frequency:  weekly
-    start_date: 20160106
-chair: Anil Rao (anil_rao), Vinay Yadhav (vnyyad)
-description:  >
-  IRC chat meeting for TaaS, Everyone is welcome.