minor #6601 Deprecated usage of AsseticBundle removed from bundles.rst (Vehsamrak)

This PR was submitted for the 3.0 branch but it was merged into the 2.8 branch instead (closes #6601).

Discussion
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Deprecated usage of AsseticBundle removed from bundles.rst

Commits
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b612563 Deprecated usage of AsseticBundle removed from bundles.rst

Author: xabbuh

book/bundles.rst

@@ -40,7 +40,6 @@ the ``registerBundles()`` method of the ``AppKernel`` class::
             new Symfony\Bundle\MonologBundle\MonologBundle(),
             new Symfony\Bundle\SwiftmailerBundle\SwiftmailerBundle(),
             new Symfony\Bundle\DoctrineBundle\DoctrineBundle(),
-            new Symfony\Bundle\AsseticBundle\AsseticBundle(),
             new Sensio\Bundle\FrameworkExtraBundle\SensioFrameworkExtraBundle(),
             new AppBundle\AppBundle(),
         );