update readme

Author: cmgmyr

readme.md

@@ -49,8 +49,6 @@ Add the trait to your user model:
 
 Create a `users` table if you do not have one already. If you need one, simply use [this example](https://github.com/cmgmyr/laravel-messenger/blob/v1/src/Cmgmyr/Messenger/examples/create_users_table.php) as a starting point, then migrate.
 
-__Note:__ if you already have a `users` table and run into any issues with foreign keys, you may have to make the `id` unsigned.
-
 Migrate your database:
 
     php artisan migrate --package=cmgmyr/messenger