remove PHP_VERSION_ID check before 50323

since our minimum php version is 5.3.23
I think, this conversion is wrong. 
The old condition `((PHP_VERSION_ID >= 50304) || strtoupper(substr(PHP_OS, 0, 3)) !== 'WIN')` yields `true` for PHP version > 50323, thus can be replaced with `true`, where `&& true` conditions can be left out completly.