Remove demo grafana dashboard

The demo happened and went well, but that means we don't need this
dashboard anymore. Remove it from project-config so that when we
manually remove it from grafana we don't get grafyaml recreating it for
us.

Change-Id: I7f86649c58357c13a1213489317ffc448d3c69dd

grafana/demo.yaml

@@ -1,132 +0,0 @@
-dashboard:
-  title: 'Nodepool: New Clouds'
-  rows:
-    - title: Description
-      height: 100px
-      panels:
-        - title: Description
-          content: |
-            **This dashboard is managed by [Grafyaml](http://docs.openstack.org/infra/system-config/grafyaml.html).**
-
-            If you would like to make changes to this dashboard, please see the grafana directory in [project-config](https://git.openstack.org/cgit/openstack-infra/project-config/tree/grafana/demo.yaml).
-          type: text
-    - title: City Cloud Nodes
-      showTitle: true
-      height: 150px
-      panels:
-        - title: Building
-          span: 3
-          sparkline:
-            full: true
-            show: true
-          targets:
-            - target: sumSeries(stats.gauges.nodepool.provider.citycloud-*.nodes.building)
-          type: singlestat
-          valueName: current
-        - title: Ready
-          span: 3
-          sparkline:
-            full: true
-            show: true
-          targets:
-            - target: sumSeries(stats.gauges.nodepool.provider.citycloud-*.nodes.ready)
-          type: singlestat
-          valueName: current
-        - title: In Use
-          span: 3
-          sparkline:
-            full: true
-            show: true
-          targets:
-            - target: sumSeries(stats.gauges.nodepool.provider.citycloud-*.nodes.used)
-          type: singlestat
-          valueName: current
-        - title: Deleting
-          span: 3
-          sparkline:
-            full: true
-            show: true
-          targets:
-            - target: sumSeries(stats.gauges.nodepool.provider.citycloud-*.nodes.delete)
-          type: singlestat
-          valueName: current
-    - title: Datacentred Nodes
-      showTitle: true
-      height: 150px
-      panels:
-        - title: Building
-          span: 3
-          sparkline:
-            full: true
-            show: true
-          targets:
-            - target: sumSeries(stats.gauges.nodepool.provider.datacentred-*.nodes.building)
-          type: singlestat
-          valueName: current
-        - title: Ready
-          span: 3
-          sparkline:
-            full: true
-            show: true
-          targets:
-            - target: sumSeries(stats.gauges.nodepool.provider.datacentred-*.nodes.ready)
-          type: singlestat
-          valueName: current
-        - title: In Use
-          span: 3
-          sparkline:
-            full: true
-            show: true
-          targets:
-            - target: sumSeries(stats.gauges.nodepool.provider.datacentred-*.nodes.used)
-          type: singlestat
-          valueName: current
-        - title: Deleting
-          span: 3
-          sparkline:
-            full: true
-            show: true
-          targets:
-            - target: sumSeries(stats.gauges.nodepool.provider.datacentred-*.nodes.delete)
-          type: singlestat
-          valueName: current
-    - title: Enter Cloud Suite Nodes
-      showTitle: true
-      height: 150px
-      panels:
-        - title: Building
-          span: 3
-          sparkline:
-            full: true
-            show: true
-          targets:
-            - target: sumSeries(stats.gauges.nodepool.provider.entercloud-*.nodes.building)
-          type: singlestat
-          valueName: current
-        - title: Ready
-          span: 3
-          sparkline:
-            full: true
-            show: true
-          targets:
-            - target: sumSeries(stats.gauges.nodepool.provider.entercloud-*.nodes.ready)
-          type: singlestat
-          valueName: current
-        - title: In Use
-          span: 3
-          sparkline:
-            full: true
-            show: true
-          targets:
-            - target: sumSeries(stats.gauges.nodepool.provider.entercloud-*.nodes.used)
-          type: singlestat
-          valueName: current
-        - title: Deleting
-          span: 3
-          sparkline:
-            full: true
-            show: true
-          targets:
-            - target: sumSeries(stats.gauges.nodepool.provider.entercloud-*.nodes.delete)
-          type: singlestat
-          valueName: current