cleanup use statements
cleanup use statements

* `use Symfony\Component\Yaml\Yaml;` not used
tiger-seo/Codeception,sergeyklay/Codeception,tiger-seo/Codeception,Naktibalda/Codeception,Vreasy/Codeception,tasselchof/Codeception,tasselchof/Codeception,Codeception/base,kt81/Codeception,Codeception/Codeception,tasselchof/Codeception,kt81/Codeception,janhenkgerritsen/Codeception,pitpit/Codeception,janhenkgerritsen/Codeception,sergeyklay/Codeception,pitpit/Codeception,Codeception/base,Naktibalda/Codeception,Naktibalda/Codeception,Vreasy/Codeception,Codeception/Codeception,Codeception/base