title: How to remove all roles from the user in spatie/laravel-permission
body: <p>whats the best or the usual way to remove all roles from a user?</p>
  <p>I tried</p>
  <p><code>$roles = $user-&gt;getRoleNames(); $user-&gt;removeRole($roles);</code></p>
  <pre><code>Return value of App\User::getStoredRole() must implement interface Spatie\Permission\Contracts\Role, instance of Illuminate\Support\Collection returned
  </code></pre>