KVM: arm/arm64: Remove unused timer variable

The 'timer' local variable became unused after commit bee038a6
("KVM: arm/arm64: Rework the timer code to use a timer_map").
Remove it to avoid [-Wunused-but-set-variable] warning.

Cc: Christoffer Dall <christoffer.dall@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Suzuki K Pouloze <suzuki.poulose@arm.com>
Reviewed-by: Julien Thierry <julien.thierry@arm.com>
Signed-off-by: Shaokun Zhang <zhangshaokun@hisilicon.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

virt/kvm/arm/arch_timer.c

@@ -236,14 +236,12 @@ static enum hrtimer_restart kvm_hrtimer_expire(struct hrtimer *hrt)
 
 static bool kvm_timer_should_fire(struct arch_timer_context *timer_ctx)
 {
-	struct arch_timer_cpu *timer;
 	enum kvm_arch_timers index;
 	u64 cval, now;
 
 	if (!timer_ctx)
 		return false;
 
-	timer = vcpu_timer(timer_ctx->vcpu);
 	index = arch_timer_ctx_index(timer_ctx);
 
 	if (timer_ctx->loaded) {