Removing unused reference

Author: weaverryan

reference/dic_tags.rst

@@ -1220,6 +1220,5 @@ For an example, see the ``EntityInitializer`` class inside the Doctrine Bridge.
 
 .. _`Twig's documentation`: http://twig.sensiolabs.org/doc/advanced.html#creating-an-extension
 .. _`Twig official extension repository`: https://github.com/fabpot/Twig-extensions
-.. _`KernelEvents`: https://github.com/symfony/symfony/blob/2.2/src/Symfony/Component/HttpKernel/KernelEvents.php
 .. _`SwiftMailer's Plugin Documentation`: http://swiftmailer.org/docs/plugins.html
 .. _`Twig Loader`: http://twig.sensiolabs.org/doc/api.html#loaders