fuse: remove duplicate check for nodeid

before this check, the nodeid has already been checked once, so
the check here doesn't make an sense, so remove the check for
nodeid here.

            if (err || !outarg->nodeid)
                    goto out_put_forget;

            err = -EIO;
    >>>     if (!outarg->nodeid)
                    goto out_put_forget;

Signed-off-by: zyfjeff <zyfjeff@linux.alibaba.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>