btrfs: Remove root parameter from btrfs_unlink_subvol

All callers pass the root tree of dir, we can push that down to the
function itself.

Signed-off-by: Lu Fengqi <lufq.fnst@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Lu Fengqi 2018-08-01 11:32:30 +08:00 • committed by David Sterba
commit 401b3b19d5