minor #10834 Remove usage of deprecated "Symfony\Component\Config\Definition\Builder\TreeBuilder::root()" (pamil)
minor #10834 Remove usage of deprecated "Symfony\Component\Config\Definition\Builder\TreeBuilder::root()" (pamil)

This PR was merged into the 1.7-dev branch.

Discussion
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Commits
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a6b93bd35f223f9eb785a44a1955ac539be32c1c Remove usage of deprecated "Symfony\Component\Config\Definition\Builder\TreeBuilder::root()"

Sylius/SyliusAdminBundle,Sylius/SyliusAdminBundle