fix(auth): remove unnecessary key deletion

Removed redundant key deletion step to streamline the login process. The key deletion was causing unnecessary overhead and potential issues during user login. This change improves the efficiency and reliability of user authentication.

auth.php

@@ -169,8 +169,6 @@ class auth_plugin_jwt extends auth_plugin_base {
             }
         }
 
-        $this->jwtmanager->delete_keys($key->userid);
-
         $user = get_complete_user_data('id', $key->userid);
         complete_user_login($user);