lib: remove redundant and incorrect sys/fcntl.h include

POSIX defines <fcntl.h>, <sys/fcntl.h> is the same thing. However,
it should not be used as it's existence can depend on C-library
implementation. E.g. musl gives warning if <sys/fcntl.h> is used.

Signed-off-by: Timo Teräs <timo.teras@iki.fi>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
1 file changed