cpuidle_unregister_governor() and cpuidle_replace_governor() aren't
used anymore and can be removed. They were used by cpufreq governors
earlier, but since the governors can't be compiled as modules any
more, these two functions aren't necessary.
Suggested-by: Daniel Lezcano <email@example.com>
Signed-off-by: Viresh Kumar <firstname.lastname@example.org>
Signed-off-by: Rafael J. Wysocki <email@example.com>