xfs: remove unused XFS_BMAPI_ flags

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>

fs/xfs/xfs_inode.c

@@ -1585,8 +1585,7 @@ xfs_itruncate_finish(
 		xfs_bmap_init(&free_list, &first_block);
 		error = xfs_bunmapi(ntp, ip,
 				    first_unmap_block, unmap_len,
-				    xfs_bmapi_aflag(fork) |
-				      (sync ? 0 : XFS_BMAPI_ASYNC),
+				    xfs_bmapi_aflag(fork),
 				    XFS_ITRUNC_MAX_EXTENTS,
 				    &first_block, &free_list,
 				    NULL, &done);