atest host: remove skylab-related logic

As it's all related to the old git-based inventory

BUG=chromium:1119035
TEST=None

Change-Id: Ifc7c38fb908a1e7c3de01a44dc8e7fb7e7aa25a7
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/autotest/+/2606920
Commit-Queue: Xixuan Wu <[email protected]>
Tested-by: Xixuan Wu <[email protected]>
Reviewed-by: Anh Le <[email protected]>
diff --git a/cli/topic_common.py b/cli/topic_common.py
index 9604dc0..c85a2e3 100644
--- a/cli/topic_common.py
+++ b/cli/topic_common.py
@@ -10,9 +10,9 @@
 operations.
 
 The class inheritance is shown here using the command
-'atest host create ...' as an example:
+'atest server list ...' as an example:
 
-atest <-- host <-- host_create <-- site_host_create
+atest <-- server <-- server_list
 
 Note: The site_<topic>.py and its classes are only needed if you need
 to override the common <topic>.py methods with your site specific ones.
@@ -274,7 +274,7 @@
     Should only be instantiated by itself for usage
     references, otherwise, the <topic> objects should
     be used."""
-    msg_topic = '[acl|host|job|label|shard|test|user|server]'
+    msg_topic = '[acl|job|label|shard|test|user|server]'
     usage_action = '[action]'
     msg_items = ''