Remove dead code written for PHP 5.2
diff --git a/system/libraries/Encryption.php b/system/libraries/Encryption.php
index a10a5c2..06284c2 100644
--- a/system/libraries/Encryption.php
+++ b/system/libraries/Encryption.php
@@ -152,10 +152,8 @@
 	public function __construct(array $params = array())
 	{
 		$this->_drivers = array(
-			'mcrypt' => defined('MCRYPT_DEV_URANDOM'),
-			// While OpenSSL is available for PHP 5.3.0, an IV parameter
-			// for the encrypt/decrypt functions is only available since 5.3.3
-			'openssl' => (is_php('5.3.3') && extension_loaded('openssl'))
+			'mcrypt'  => defined('MCRYPT_DEV_URANDOM'),
+			'openssl' => extension_loaded('openssl')
 		);
 
 		if ( ! $this->_drivers['mcrypt'] && ! $this->_drivers['openssl'])