I have a project licensed under the LGPL-3.0. A major contributor recently stopped contributing, and is now requesting all their contributions to be removed from the project. All the code in the project is under copyright under the LGPL-3.0. I saw [this answer](https://opensource.stackexchange.com/a/5855), but it didn’t make it clear for this situation whether the contributor had copyright over their work. Can someone request their code to be removed from a project?