sh: fix smp-shx3 build regression from removal of arch localtimer

The removal was not complete and left behind one reference to a
removed function in smp-shx3.c. For completeness, also remove
declarations for functions that were removed.

Fixes: 45624ac3 "sh: remove arch-specific localtimer and use generic one"
Reported-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: NRich Felker <dalias@libc.org>

arch/sh/include/asm/smp.h

@@ -34,11 +34,6 @@ enum {
 DECLARE_PER_CPU(int, cpu_state);
 
 void smp_message_recv(unsigned int msg);
-void smp_timer_broadcast(const struct cpumask *mask);
-
-void local_timer_interrupt(void);
-void local_timer_setup(unsigned int cpu);
-void local_timer_stop(unsigned int cpu);
 
 void arch_send_call_function_single_ipi(int cpu);
 void arch_send_call_function_ipi_mask(const struct cpumask *mask);

arch/sh/kernel/cpu/sh4a/smp-shx3.c

@@ -73,8 +73,6 @@ static void shx3_prepare_cpus(unsigned int max_cpus)
 {
 	int i;
 
-	local_timer_setup(0);
-
 	BUILD_BUG_ON(SMP_MSG_NR >= 8);
 
 	for (i = 0; i < SMP_MSG_NR; i++)