[cs] Remove psr0 check
[cs] Remove psr0 check

Project is PSR-4 compliant and php-cs-fixer psr0 is bugged (sometimes change to lowercase subnamaspace https://github.com/FriendsOfPHP/PHP-CS-Fixer/issues/1161)

Maks3w/zend-inputfilter,akomm/zend-inputfilter,zf2timo/zend-inputfilter,akrabat/zend-inputfilter,Blinden/zend-inputfilter,stefanotorresi/zend-inputfilter,zendframework/zend-inputfilter,weierophinney/zend-inputfilter,MadCat34/zend-inputfilter