[PATCH] Remove unused 'kobject' from superblock

The field in question is
  a) unused
  b) damn next to impossible to use correctly, due to struct super_block
     lifetime and locking rules.

include/linux/fs.h

@@ -751,7 +751,6 @@ struct super_block {
 
 	char s_id[32];				/* Informational name */
 
-	struct kobject           kobj;          /* anchor for sysfs */
 	void 			*s_fs_info;	/* Filesystem private info */
 
 	/*