Move the rest of packages to main overlay

Reviewed-by: Aleix Boné <abonerib@bsc.es>

pkgs/overlay.nix

@@ -1,18 +0,0 @@
-final: prev:
-{
-  prometheus-slurm-exporter = prev.callPackage ./slurm-exporter.nix { };
-  meteocat-exporter = prev.callPackage ./meteocat-exporter/default.nix { };
-  upc-qaire-exporter = prev.callPackage ./upc-qaire-exporter/default.nix { };
-  cudainfo = prev.callPackage ./cudainfo/default.nix { };
-
-  amd-uprof = prev.callPackage ./amd-uprof/default.nix { };
-
-  # FIXME: Extend this to all linuxPackages variants. Open problem, see:
-  # https://discourse.nixos.org/t/whats-the-right-way-to-make-a-custom-kernel-module-available/4636
-  linuxPackages = prev.linuxPackages.extend (_final: _prev: {
-    amd-uprof-driver = _prev.callPackage ./amd-uprof/driver.nix { };
-  });
-  linuxPackages_latest = prev.linuxPackages_latest.extend(_final: _prev: {
-    amd-uprof-driver = _prev.callPackage ./amd-uprof/driver.nix { };
-  });
-}