Remove unnecessary netinet/in_systm.h include.
Remove unnecessary netinet/in_systm.h include.

Compiles on i386, which is the only architecture where COMPAT_LINUX is
enabled at the moment.

"If it compiles, go ahead" pirofti@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars