Squashfs: get rid of obsolete variable in struct squashfs_sb_info

Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>

fs/squashfs/squashfs_fs_sb.h

@@ -61,7 +61,6 @@ struct squashfs_sb_info {
 	int					next_meta_index;
 	__le64					*id_table;
 	__le64					*fragment_index;
-	unsigned int				*fragment_index_2;
 	struct mutex				read_data_mutex;
 	struct mutex				meta_index_mutex;
 	struct meta_index			*meta_index;