ceph: remove unused #includes

Remove unused #include's in
  fs/ceph/super.c
Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: Sage Weil <sage@newdream.net>

fs/ceph/super.c

@@ -8,14 +8,11 @@
 #include <linux/module.h>
 #include <linux/mount.h>
 #include <linux/parser.h>
-#include <linux/rwsem.h>
 #include <linux/sched.h>
 #include <linux/seq_file.h>
 #include <linux/slab.h>
 #include <linux/statfs.h>
 #include <linux/string.h>
-#include <linux/version.h>
-#include <linux/vmalloc.h>
 
 #include "decode.h"
 #include "super.h"