Removed an unneeded versionadded directive

Author: javiereguiluz

security.rst

@@ -279,10 +279,6 @@ important section is ``firewalls``:
             ],
         ]);
 
-.. versionadded:: 4.4
-
-    The ``anonymous: lazy`` option was introduced in Symfony 4.4.
-
 A "firewall" is your authentication system: the configuration below it defines
 *how* your users will be able to authenticate (e.g. login form, API token, etc).