btrfs: remove btrfs_inode parameter from btrfs_delayed_inode_reserve_metadata

It's only used for tracepoint to obtain the inode number, but we already
have the ino from btrfs_delayed_node::inode_id.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>