fix voting on multiple roles behavior description

Author: xabbuh

reference/twig_reference.rst

@@ -294,8 +294,7 @@ is_granted
 
 Returns ``true`` if the current user has the given role. If several roles are
 passed in an array, ``true`` is returned if the user has at least one of
-them or all of them, depending on the
-:ref:`Access Decision Manager strategy <security-access-control-enforcement-options>`.
+them.
 
 Optionally, an object can be passed to be used by the voter. More information
 can be found in :ref:`security-template`.

security/access_control.rst

@@ -134,9 +134,7 @@ options:
 * ``roles`` If the user does not have the given role, then access is denied
   (internally, an :class:`Symfony\\Component\\Security\\Core\\Exception\\AccessDeniedException`
   is thrown). If this value is an array of multiple roles, the user must have
-  at least one of them (when using the default ``affirmative`` strategy in the
-  :ref:`Access Decision Manager <components-security-access-decision-manager>`)
-  or all of them when using the ``unanimous`` strategy;
+  at least one of them.
 
 * ``allow_if`` If the expression returns false, then access is denied;