removed deprecated
removed deprecated

- removed session_unregister

iolevel/peachpie-concept,peachpiecompiler/peachpie,peachpiecompiler/peachpie,peachpiecompiler/peachpie,iolevel/peachpie,iolevel/peachpie,iolevel/peachpie-concept,iolevel/peachpie-concept,iolevel/peachpie