This actually saves two clock_gettime(CLOCK_MONOTONIC) system calls
(albeit to the vDSO): one inside QDeadlineTimer::remainingTimeNSecs() to
calculate the remaining time from the deadline, then one other inside
pthread_cond_timedwait_relative_np() to calculate the deadline from the
timeout, so it can place the FUTEX_WAIT_BITSET system call.
In fact, I can't find __pthread_cond_timedwait_relative() in the Bionic
source any more. The last reference was removed in 2015, when Bionic
started using FUTEX_WAIT_BITSET. So this commit is just removing dead
code in current Android.
Pick-to: 6.5
Change-Id: Ieec322d73c1e40ad95c8fffd174689c4fcff40ae
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
2a997942db