btrfs: remove orig from shrink_delalloc

We don't use this anywhere inside of shrink_delalloc since 17024ad
("Btrfs: fix early ENOSPC due to delalloc"), remove it.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Tested-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/space-info.c

@@ -517,7 +517,7 @@ static inline u64 calc_reclaim_items_nr(struct btrfs_fs_info *fs_info,
  * shrink metadata reservation for delalloc
  */
 static void shrink_delalloc(struct btrfs_fs_info *fs_info, u64 to_reclaim,
-			    u64 orig, bool wait_ordered)
+			    bool wait_ordered)
 {
 	struct btrfs_space_info *space_info;
 	struct btrfs_trans_handle *trans;
@@ -742,7 +742,7 @@ static void flush_space(struct btrfs_fs_info *fs_info,
 		break;
 	case FLUSH_DELALLOC:
 	case FLUSH_DELALLOC_WAIT:
-		shrink_delalloc(fs_info, num_bytes * 2, num_bytes,
+		shrink_delalloc(fs_info, num_bytes * 2,
 				state == FLUSH_DELALLOC_WAIT);
 		break;
 	case FLUSH_DELAYED_REFS_NR: