minor #10234 [Security] Remove acl (alavieille)

This PR was submitted for the 4.0 branch but it was merged into the 3.4 branch instead (closes #10234).

Discussion
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[Security] Remove acl

The security-acl component has been removed of security component since 4.0

Commits
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103ca88 remove acl

Author: xabbuh

components/security.rst

@@ -9,7 +9,7 @@ The Security Component
     authentication, interactive form login or X.509 certificate login, but also
     allows you to implement your own authentication strategies. Furthermore, the
     component provides ways to authorize authenticated users based on their
-    roles, and it contains an advanced ACL system.
+    roles.
 
 Installation
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@@ -36,9 +36,6 @@ used separately:
 ``symfony/security-csrf``
     It provides protection against `CSRF attacks`_.
 
-``symfony/security-acl``
-    It provides a fine grained permissions mechanism based on Access Control Lists.
-
 .. seealso::
 
     This article explains how to use the Security features as an independent