fs/hfs/hfs_fs.h: remove redundant sys_tz declaration

sys_tz is already declared in include/linux/time.h

Signed-off-by: Fabian Frederick <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

fs/hfs/hfs_fs.h

···
 /* super.c */
 extern void hfs_mark_mdb_dirty(struct super_block *sb);
 
-extern struct timezone sys_tz;
-
 /*
  * There are two time systems.  Both are based on seconds since
  * a particular time/date.