- remove the old LGPL license headers from all files in Spack - add SPDX headers to all files - core and most packages are (Apache-2.0 OR MIT) - a very small number of remaining packages are LGPL-2.1-only
* A new package: py-openslide-python. * Update. * Remove py-pytorch package. * Remove nektar package. * Remove install_time_test_callbacks