Remove a versionadded directive

Author: javiereguiluz

security/ldap.rst

@@ -197,12 +197,6 @@ use the ``ldap`` user provider.
             ;
         };
 
-.. versionadded:: 5.4
-
-    The ``LdapUser::getExtraFields()`` method always returns an array of values.
-    In prior Symfony versions, ``LdapUserProvider`` threw an ``InvalidArgumentException``
-    on multiple attributes.
-
 .. caution::
 
     The Security component escapes provided input data when the LDAP user