He removed his repository because it was used by a company that he thinks it did something he disliked. I don't know why it matters, at least in the grand scheme of things. For him it probably matters due to his personal views and it'll probably matter for those who align with his views (assuming they know about that move).

In any case, anyone is free to do with their code whatever they like. If you depend on anyone else's code keep in mind that you do not have control over them and any expectations you may have about their actions may not match theirs, so take that into consideration when making those dependencies.