V4L/DVB: [Mantis] remove duplicated #include

Remove duplicated #include('s) in
  drivers/media/dvb/mantis/mantis_hif.c
  drivers/media/dvb/mantis/mantis_pci.c
Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/mantis/mantis_hif.c

@@ -22,8 +22,6 @@
 #include <linux/signal.h>
 #include <linux/sched.h>
 
-#include <linux/signal.h>
-#include <linux/sched.h>
 #include <linux/interrupt.h>
 
 #include "dmxdev.h"

drivers/media/dvb/mantis/mantis_pci.c

@@ -41,11 +41,6 @@
 #include "dvb_frontend.h"
 #include "dvb_net.h"
 
-#include <asm/irq.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/interrupt.h>
-
 #include "mantis_common.h"
 #include "mantis_reg.h"
 #include "mantis_pci.h"