Remove 'nova-cells' service

We're going to start unpicking this stuff from the top down. Start with
the 'nova-cells' executable itself.

Part of blueprint remove-cells-v1

Change-Id: I5bd1dd9f1bbae7a977ab9e032c4f4d200c35e193
Signed-off-by: Stephen Finucane <[email protected]>

Author: stephenfin

nova/cmd/cells.py

@@ -59,7 +59,6 @@
     'nova-conductor': 'nova.conductor.manager.ConductorManager',
     'nova-metadata': 'nova.api.manager.MetadataManager',
     'nova-scheduler': 'nova.scheduler.manager.SchedulerManager',
-    'nova-cells': 'nova.cells.manager.CellsManager',
 }
 
 

nova/service.py

@@ -0,0 +1,5 @@
+---
+upgrade:
+  - |
+    The *cells v1* feature has been deprecated since the 16.0.0 Pike release
+    and has now been removed. The ``nova-cells`` service has been removed.

releasenotes/notes/remove-cells-v1-055028c270d06680.yaml

@@ -57,7 +57,6 @@ console_scripts =
     nova-api = nova.cmd.api:main
     nova-api-metadata = nova.cmd.api_metadata:main
     nova-api-os-compute = nova.cmd.api_os_compute:main
-    nova-cells = nova.cmd.cells:main
     nova-compute = nova.cmd.compute:main
     nova-conductor = nova.cmd.conductor:main
     nova-console = nova.cmd.console:main