note that we do not keep track of migrated ganeti machines anymore

See team#29816

howto/ganeti.md

@@ -403,8 +403,8 @@ Import procedure:
  
         ./retire -H $INSTANCE retire-instance --parent-host $KVM_HOST
 
- 12. update the [Nextcloud spreadsheet](https://nc.torproject.net/apps/onlyoffice/5395) to change where the machine
-     lives
+ 12. update the [Nextcloud spreadsheet](https://nc.torproject.net/apps/onlyoffice/5395) to remove the machine from
+     the KVM host
 
  13. warn users about the migration, for example: