context_tracking: Remove context_tracking_active()

This function is a leftover from old removal or rename. We can drop it.
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J . Wysocki <rjw@rjwysocki.net>
Cc: Rik van Riel <riel@surriel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Wanpeng Li <wanpengli@tencent.com>
Cc: Yauheni Kaliuta <yauheni.kaliuta@redhat.com>
Link: https://lkml.kernel.org/r/20191016025700.31277-5-frederic@kernel.orgSigned-off-by: Ingo Molnar <mingo@kernel.org>

include/linux/context_tracking_state.h

@@ -42,7 +42,6 @@ static inline bool context_tracking_in_user(void)
 }
 #else
 static inline bool context_tracking_in_user(void) { return false; }
-static inline bool context_tracking_active(void) { return false; }
 static inline bool context_tracking_is_enabled(void) { return false; }
 static inline bool context_tracking_cpu_is_enabled(void) { return false; }
 #endif /* CONFIG_CONTEXT_TRACKING */