remove useless return value checks for functions that cannot fail
remove useless return value checks for functions that cannot fail

chardi/musl,davidlazar/musl,chardi/musl,chneukirchen/musl-chris2,rofl0r/musl-old,davidlazar/musl,chardi/musl,chneukirchen/musl-chris2,rofl0r/musl-old