[NET_SCHED]: Remove unnecessary includes

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sched/sch_hfsc.c

@@ -53,7 +53,6 @@
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/errno.h>
-#include <linux/jiffies.h>
 #include <linux/compiler.h>
 #include <linux/spinlock.h>
 #include <linux/skbuff.h>
@@ -62,13 +61,11 @@
 #include <linux/list.h>
 #include <linux/rbtree.h>
 #include <linux/init.h>
-#include <linux/netdevice.h>
 #include <linux/rtnetlink.h>
 #include <linux/pkt_sched.h>
 #include <net/netlink.h>
 #include <net/pkt_sched.h>
 #include <net/pkt_cls.h>
-#include <asm/system.h>
 #include <asm/div64.h>
 
 /*