How to delete an item by uid dgraph-js

My mutation looks something like this

// mutate with variables
        const p = {
            "Profile.username": username,
            "Profile.rname": rname,
            "Profile.profilePicture": profilePicture,
            "Profile.backgroundPicture": backgroundPicture,
            "Profile.accent": accent,
            "Profile.isVerified": false,
            "Profile.isBanned": false,
        };
        const mu = new dgraph.Mutation();
        mu.setSetJson(p);
        await txn.mutate(mu);
        await txn.commit();
        return true;

and relationships using the setSetNquads function