Remove PHPDoc in Test.php files

When I just started to use PHP_CodeSniffer I wasn't aware how to make PHPDoc's of functions/methods non-required in some files (e.g. tests), so I created "Live Template" in PhpStorm to create them for me.

This decision without doubt increased test suite size. With https://github.com/aik099/CodingStandard/commit/10da2eea4b5ce0289500f6c2c3c44e4652f7068d commit this is not a problem and we can safely remove not needed comments.