We might have some conception of rights, might not, might have some other moral structure, might not, but we wouldn't have a conception of human rights likely, which has always had that "not stripped away" based around application by a state to individual atomized humans. This contradiction will almost always exist in human rights and for the reason of it being for individuals outside of communities, it serves capitalism likely better than other modes of production. There are older forms of rights, or even different neo-republican positive rights, or non rights based morality structures, although maybe none of these will be in the communist society.