Merge branch '6.0' into 6.1

* 6.0:
  Remove deprecated features
  [Security] Add deprecation information for is_anonymous

Author: javiereguiluz

security/expressions.rst

@@ -24,7 +24,7 @@ accepts an :class:`Symfony\\Component\\ExpressionLanguage\\Expression` object::
         public function index(): Response
         {
             $this->denyAccessUnlessGranted(new Expression(
-                '"ROLE_ADMIN" in role_names or (not is_anonymous() and user.isSuperAdmin())'
+                '"ROLE_ADMIN" in role_names or (is_authenticated() and user.isSuperAdmin())'
             ));
 
             // ...
@@ -64,10 +64,6 @@ Additionally, you have access to a number of functions inside the expression:
 ``is_authenticated()``
     Returns ``true`` if the user is authenticated via "remember-me" or authenticated
     "fully" - i.e. returns true if the user is "logged in".
-``is_anonymous()``
-    Returns ``true`` if the user is anonymous. That is, the firewall confirms that it
-    does not know this user's identity. This is different from ``IS_AUTHENTICATED_ANONYMOUSLY``,
-    which is granted to *all* users, including authenticated ones.
 ``is_remember_me()``
     Similar, but not equal to ``IS_AUTHENTICATED_REMEMBERED``, see below.
 ``is_fully_authenticated()``