I've moved the German part-of-speech data to its own Maven and git project at https://github.com/languagetool-org/german-pos-dict. This way we don't have to keep the binary files in the LT git repo. Also see #200. This new external project is thus now a dependency for LT.
If you want to do the same for "your" language, feel free. It does come with some cost, though: you'll need to make your own releases and LT can only rely on releases of your artifact, not on snapshots. (Actually, you can use snapshots, but then need to change to a release version before we can make a LT release.)