Remove comment detail only relevant in tj#1934

Author: aweebit

lib/command.js

@@ -1514,8 +1514,7 @@ Expecting one of '${allowedValues.join("', '")}'`);
 
       // Not a recognised option by this command. Might be
       // - a subcommand,
-      // - the help option encountered after a subcommand (considered unknown),
-      // - any other option unknown to this command,
+      // - an option unknown to this command,
       // - or a command-argument.
 
       if (onlyKnownOptionsSoFar && !reprocessedBySubcommand) {