net/sched: act_mirred: remove duplicated include from act_mirred.c

Remove duplicated include.
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sched/act_mirred.c

@@ -28,8 +28,6 @@
 #include <linux/tc_act/tc_mirred.h>
 #include <net/tc_act/tc_mirred.h>
 
-#include <linux/if_arp.h>
-
 #define MIRRED_TAB_MASK     7
 static LIST_HEAD(mirred_list);
 static DEFINE_SPINLOCK(mirred_list_lock);