[MIPS] SNI: Remove unneeded sni_machine_halt

Signed-off-by: Yoichi Yuasa <[e-mail]>
Signed-off-by: Ralf Baechle <[e-mail]>

arch/mips/sni/reset.c

···
 	}
 }
 
-void sni_machine_halt(void)
-{
-}
-
 void sni_machine_power_off(void)
 {
 	*(volatile unsigned char *)PCIMT_CSWCSM = 0xfd;

arch/mips/sni/setup.c

···
 unsigned int sni_brd_type;
 
 extern void sni_machine_restart(char *command);
-extern void sni_machine_halt(void);
 extern void sni_machine_power_off(void);
 
 static void __init sni_display_setup(void)
···
 	}
 
 	_machine_restart = sni_machine_restart;
-	_machine_halt = sni_machine_halt;
 	pm_power_off = sni_machine_power_off;
 
 	sni_display_setup();