[PKT_SCHED]: Eliminate unnecessary includes in simple.c

Noted by Al Viro.

Signed-off-by: David S. Miller <davem@davemloft.net>

net/sched/simple.c

@@ -10,27 +10,13 @@
  *
  */
 
-#include <asm/uaccess.h>
-#include <asm/system.h>
-#include <asm/bitops.h>
 #include <linux/config.h>
-#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/init.h>
 #include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/socket.h>
-#include <linux/sockios.h>
-#include <linux/in.h>
-#include <linux/errno.h>
-#include <linux/interrupt.h>
 #include <linux/netdevice.h>
 #include <linux/skbuff.h>
 #include <linux/rtnetlink.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/proc_fs.h>
-#include <net/sock.h>
 #include <net/pkt_sched.h>
 
 #define TCA_ACT_SIMP 22