x86: Remove unused function lapic_watchdog_ok()

lapic_watchdog_ok() is a global function but no one is using it.

Signed-off-by: Jaswinder Singh Rajput <[e-mail]>
Cc: Andi Kleen <[e-mail]>
Cc: Yinghai Lu <[e-mail]>
LKML-Reference: <[e-mail]>
Signed-off-by: Ingo Molnar <[e-mail]>

arch/x86/include/asm/nmi.h

···
 int lapic_watchdog_init(unsigned nmi_hz);
 int lapic_wd_event(unsigned nmi_hz);
 unsigned lapic_adjust_nmi_hz(unsigned hz);
-int lapic_watchdog_ok(void);
 void disable_lapic_nmi_watchdog(void);
 void enable_lapic_nmi_watchdog(void);
 void stop_nmi(void);

arch/x86/kernel/cpu/perfctr-watchdog.c

···
 	wd_ops->rearm(wd, nmi_hz);
 	return 1;
 }
-
-int lapic_watchdog_ok(void)
-{
-	return wd_ops != NULL;
-}