The following were not used in any code:
__RTEMS_USE_TICKS_CPU_USAGE_STATISTICS__
__RTEMS_USE_TICKS_RATE_MONOTONIC_STATISTICS__
Both CPU Usage and Rate Monotonic Period Statistics are switched
to ticks resolution by configuring with __RTEMS_USE_TICKS_FOR_STATISTICS__
set to 1 on the configure command line.