udf: super.c Fix warning: variable 'sbi' set but not used

This fixes this warning when building the kernel:
  CC      fs/udf/super.o
fs/udf/super.c: In function 'udf_load_sequence':
fs/udf/super.c:1582:22: warning: variable 'sbi' set but not used
Please have a look, when you have time and let me know.
Signed-off-by: Justin P. Mattock <justinmattock@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>

fs/udf/super.c

@@ -1579,9 +1579,7 @@ static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
 {
 	struct anchorVolDescPtr *anchor;
 	long main_s, main_e, reserve_s, reserve_e;
-	struct udf_sb_info *sbi;
 
-	sbi = UDF_SB(sb);
 	anchor = (struct anchorVolDescPtr *)bh->b_data;
 
 	/* Locate the main sequence */