Remove warning detail only relevant when thenables from argParsers are awaited

Must be reverted when merged with tj#1913 or tj#1915

Author: aweebit

lib/command.js

@@ -1229,7 +1229,7 @@ Call on top-level command instead`);
     // callback might return a promise
     const result = fn();
     if (!PRODUCTION && !this._asyncParsing && isThenable(result)) {
-      console.warn(`.parse() is incompatible with async argParsers, hooks and actions.
+      console.warn(`.parse() is incompatible with async hooks and actions.
 Use .parseAsync() instead.`);
     }
     return result;