Since [Hadoop1 support was removed](https://github.com/JanusGraph/janusgraph/commit/0931a34c70168734be7da369a0c398fdb356693a), we should update the example command lines in [`docs/intro.txt`]( https://github.com/JanusGraph/janusgraph/blob/dc67ce73c08e79fa65b30bc8280861056070c573/docs/intro.txt#L153-L157) accordingly, because it's currently broken.
Since Hadoop1 support was removed, we should update the example command lines in
docs/intro.txtaccordingly, because it's currently broken.