[PATCH] time: silence warning in tick_nohz_init().

[majianpeng]

Fix those warning message when compile:
>kernel/time/tick-sched.c: In function ‘tick_nohz_init’:
>kernel/time/tick-sched.c:346:6: warning: unused variable ‘cpu’ 
>[-Wunused-variable]

Signed-off-by: Jianpeng Ma <majianp...@gmail.com>
---
 kernel/time/tick-sched.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 6960172..ca1d6e3 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -343,8 +343,6 @@ static int tick_nohz_init_all(void)
 
 void __init tick_nohz_init(void)
 {
-       int cpu;
-
        if (!have_nohz_full_mask) {
                if (tick_nohz_init_all() < 0)
                        return;
-- 
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