Mention that packages can be uninstalled by hash (#16863)
Mention that packages can be uninstalled by hash (#16863)


LLNL/spack,iulian787/spack,LLNL/spack,iulian787/spack,iulian787/spack,iulian787/spack,LLNL/spack,iulian787/spack,LLNL/spack,LLNL/spack