btrfs: drop unused parameter path from btrfs_tree_mod_log_rewind()

The path parameter was used for our own locking, that got converted to
rwsem eventually. Last usage in ac5887c8e013d6 ("btrfs: locking: remove
all the blocking helpers").

Reviewed-by: Anand Jain <[e-mail]>
Signed-off-by: David Sterba <[e-mail]>

fs/btrfs/ctree.c

···
 
 		level = btrfs_header_level(b);
 		btrfs_tree_read_lock(b);
-		b = btrfs_tree_mod_log_rewind(fs_info, p, b, time_seq);
+		b = btrfs_tree_mod_log_rewind(fs_info, b, time_seq);
 		if (!b) {
 			ret = -ENOMEM;
 			goto done;

fs/btrfs/tree-mod-log.c

···
  * is freed (its refcount is decremented).
  */
 struct extent_buffer *btrfs_tree_mod_log_rewind(struct btrfs_fs_info *fs_info,
-						struct btrfs_path *path,
 						struct extent_buffer *eb,
 						u64 time_seq)
 {

fs/btrfs/tree-mod-log.h

···
 				  enum btrfs_mod_log_op op);
 int btrfs_tree_mod_log_free_eb(struct extent_buffer *eb);
 struct extent_buffer *btrfs_tree_mod_log_rewind(struct btrfs_fs_info *fs_info,
-						struct btrfs_path *path,
 						struct extent_buffer *eb,
 						u64 time_seq);
 struct extent_buffer *btrfs_get_old_root(struct btrfs_root *root, u64 time_seq);