Merge pull request #386 from samsonasik/security-csrf

remove unused $this->_csrf_hash assignment in Security::CSRFVerify()

Author: lonnieezell

system/Security/Security.php

@@ -201,7 +201,6 @@ public function CSRFVerify(RequestInterface $request)
 		{
 			// Nothing should last forever
 			unset($_COOKIE[$this->CSRFCookieName]);
-			$this->_csrf_hash = null;
 		}
 
 		$this->CSRFSetHash();