cli: remove 'list server'

list servers already provides the same.

cli/cli.py

@@ -72,8 +72,7 @@ class OgCLI():
 
     def list(self, args):
         choices = ['clients', 'scopes', 'modes', 'hardware',
-                   'client', 'images', 'disks', 'server',
-                   'servers', 'repos']
+                   'client', 'images', 'disks', 'servers', 'repos']
         parser = argparse.ArgumentParser(prog='ogcli list')
         parser.add_argument('item', choices=choices)
 
@@ -99,7 +98,7 @@ class OgCLI():
             OgDisk.list_disks(self.rest, args[1:])
         elif parsed_args.item == 'repos':
             OgRepo.list_repos(self.rest)
-        elif parsed_args.item in ['server', 'servers']:
+        elif parsed_args.item == 'servers':
             OgServer.list_servers(self.rest)
 
     def set(self, args):