[PATCH] hrtimers: remove DEFINE_KTIME and ktime_to_clock_t()

Now that it_real_value is gone, the last user of DEFINE_KTIME and
ktime_to_clock_t are also gone, so remove it before someone starts using it
again.

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>