Fixing bad merge - this section should not have been left in

Author: weaverryan

book/security.rst

@@ -1228,62 +1228,6 @@ cookie will be ever created by Symfony):
     If you use a form login, Symfony will create a cookie even if you set
     ``stateless`` to ``true``.
 
-Utilities
----------
-
-.. versionadded:: 2.2
-    The ``StringUtils`` and ``SecureRandom`` classes were introduced in Symfony
-    2.2
-
-The Symfony Security component comes with a collection of nice utilities related
-to security. These utilities are used by Symfony, but you should also use
-them if you want to solve the problem they address.
-
-Comparing Strings
-~~~~~~~~~~~~~~~~~
-
-The time it takes to compare two strings depends on their differences. This
-can be used by an attacker when the two strings represent a password for
-instance; it is known as a `Timing attack`_.
-
-Internally, when comparing two passwords, Symfony uses a constant-time
-algorithm; you can use the same strategy in your own code thanks to the
-:class:`Symfony\\Component\\Security\\Core\\Util\\StringUtils` class::
-
-    use Symfony\Component\Security\Core\Util\StringUtils;
-
-    // is password1 equals to password2?
-    $bool = StringUtils::equals($password1, $password2);
-
-Generating a secure random Number
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-Whenever you need to generate a secure random number, you are highly
-encouraged to use the Symfony
-:class:`Symfony\\Component\\Security\\Core\\Util\\SecureRandom` class::
-
-    use Symfony\Component\Security\Core\Util\SecureRandom;
-
-    $generator = new SecureRandom();
-    $random = $generator->nextBytes(10);
-
-The
-:method:`Symfony\\Component\\Security\\Core\\Util\\SecureRandom::nextBytes`
-methods returns a random string composed of the number of characters passed as
-an argument (10 in the above example).
-
-The SecureRandom class works better when OpenSSL is installed but when it's
-not available, it falls back to an internal algorithm, which needs a seed file
-to work correctly. Just pass a file name to enable it::
-
-    $generator = new SecureRandom('/some/path/to/store/the/seed.txt');
-    $random = $generator->nextBytes(10);
-
-.. note::
-
-    You can also access a secure random instance directly from the Symfony
-    dependency injection container; its name is ``security.secure_random``.
-
 .. _book-security-checking-vulnerabilities:
 
 Checking for Known Security Vulnerabilities in Dependencies