Drop storyboard meeting

This project is no longer active and isn't holding meetings anymore.
Drop the meeting listing to avoid future confusion.

Change-Id: I5706b1913c725b9b9327a44cd17d24545791bf43

meetings/storyboard-meeting.yaml

@@ -1,12 +0,0 @@
-project:  StoryBoard Meeting
-meeting_id: storyboard
-agenda_url: https://wiki.openstack.org/wiki/Meetings/StoryBoard
-schedule:
-  - time:       '1800'
-    day:        Thursday
-    irc:        storyboard
-    frequency:  weekly
-    start_date: 20160106
-chair:  Adam Coldrick (SotK), Kendall Nelson (diablo_rojo)
-description:  >
-  This is the weekly StoryBoard team meeting.