Revert "Switch dependencies to gnatcoll_core" This reverts commit ee2d9c6fb6c22ad2a3e3c0da4e530c59de10f922 because gnatcoll_core is introduced by libgnatcoll/25 and for now Debian only provides libgnatcoll/24.
remove Artifacts from projects Gprinstall has no option to skip artifacts or change their destination. Anyways, it cannot be executed during architecture-independant builds.
