All the deprecated code introduced on 2.x is removed on 3.0.
Please read the 2.x upgrade guide for more information.
See also the diff
Both Sonata\CacheBundle\Adapter\SsiCache
and
Sonata\CacheBundle\Adapter\VarnishCache
now require you provide their
constructor with an ControllerResolverInterface
and
ArgumentResolverInterface
instance.
Now that only PHP 7 is supported, many signatures have changed: type hinting was added for the parameters or the return value.