LinuxKPI: remove timer KPI from Linux version before 4.15HEADmain

Now that semi-native drivers in main are clean of using any
pre-4.15 Linux timer KPI, remove the macros from LinuxKPI as well.

Supported versions of drm-kmod and the oldest nvidia port seem fine
based on my checks.  If anything else surfaces we can deal with the
fallout; the changes to the newer KPI were mechanical in Linux and
can be applied easily.

This change can be detected by #if !defined(init_timer)
at compile time so no need for a __FreeBSD_version bump.

MFC after:	3 days
Reviewed by:	emaste
Differential Revision: https://reviews.freebsd.org/D59688

0 files changed, 0 insertions, 0 deletions