Revert "Allow "python-hy" (Python 2 version) to satisfy the meta "hy" package if it's already installed (but still default to "python3-hy")"

This reverts commit 737bcbf23fce8d0df2b0b4c6b7747b8dbd680d8a.

This doesn't make sense because python-hy doesn't use update-alternatives.  Cavemen don't get Hy.
Update Standards-Version to 3.9.6
Version bump