Revert unintentional interface change

The change occurred in be39218 in PR labelle-org#22. See labelle-org#27.

Author: maresb

src/labelle/cli/cli.py

@@ -123,8 +123,7 @@ def default(
             "--device",
             help=(
                 "Select a particular device by filtering for a given substring "
-                "in the device's manufacturer, product or serial number. Call "
-                "with 'list' to list all available devices."
+                "in the device's manufacturer, product or serial number"
             ),
             rich_help_panel="Device Configuration",
         ),
@@ -243,9 +242,6 @@ def default(
         # Neither --verbose flag nor the environment variable is set.
         set_not_verbose()
 
-    if device_pattern == ["list"]:
-        list_devices()
-
     # read config file
     try:
         font_path = get_font_path(font=font, style=style)