login-utils: remove _HAVE_UT_TV fallback

_HAVE_UT_TV is glibc only. Moreover we want to move to utmpx where
timeval is standard.

Now utmp/subsecond (1173d0a6) should work on all supported systems.

CC: Sami Kerola <kerolasa@iki.fi>
Signed-off-by: Ruediger Meier <ruediger.meier@ga-group.nl>
5 files changed