time: Get rid of do_posix_clock_monotonic_gettime

All users gone. Remove it before we get another one.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h
index 3aa72e6..6e191e4 100644
--- a/include/linux/timekeeping.h
+++ b/include/linux/timekeeping.h
@@ -145,7 +145,6 @@
 }
 #endif
 
-#define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)
 #define ktime_get_real_ts64(ts)	getnstimeofday64(ts)
 
 /*