drop links to scala-module-dependency-sample

[SethTisue]

https://github.com/scala/scala-module-dependency-sample is archived, but at https://github.com/retronym/scala-module-dependency-sample/pull/1 @retronym noticed that we link to it from this repo, e.g. from https://docs.scala-lang.org/tutorials/scala-with-maven.html (perhaps elsewhere)