Remove references to pypi mirroring from dashboard

Because we are reverse proxying PyPI, there is no reason to keep
the mirroring information in the AFS dashboard.

It is confusing, as it leads to thinking the pypi mirrors are
outdated.

[1]: https://review.openstack.org/#/c/597399/

Change-Id: Ic01f40cea16d82ad49fcde5bf329aedb43aac2d0

grafana/afs.yaml

@@ -138,15 +138,6 @@ dashboard:
       showTitle: true
       panels:
 
-        - title: mirror.pypi
-          type: singlestat
-          valueName: current
-          span: 2
-          targets:
-            - target: "scale(stats.gauges.afs.afs01_dfw_openstack_org.vol.mirror_pypi_readonly.creation, 1000)"
-          format: dateTimeFromNow
-          valueFontSize: "50%"
-
         - title: mirror.ubuntu
           type: singlestat
           valueName: current
@@ -215,23 +206,6 @@ dashboard:
       showTitle: true
       panels:
 
-        - title: mirror.pypi
-          type: graph
-          span: 4
-          yaxes:
-            - format: deckbytes
-              min: 0
-            - format: deckbytes
-              min: 0
-          targets:
-            - target: "alias(stats.gauges.afs.afs01_dfw_openstack_org.vol.mirror_pypi.used, 'Used')"
-              refId: A
-            - target: "alias(stats.gauges.afs.afs01_dfw_openstack_org.vol.mirror_pypi.quota, 'Quota')"
-              refId: B
-            - target: "divideSeries(stats.gauges.afs.afs01_dfw_openstack_org.vol.mirror_pypi.used, #B)"
-              refId: C
-              hide: true
-
         - title: mirror.ubuntu
           type: graph
           span: 4