nixos/file-roller: drop

Drops the `programs.file-roller` option as it is not needed for the
program to function and removes all instances of it being used within
nixpkgs.

In addition, file-roller is also removed from being included by
default in GNOME as it's not part of the GNOME core applications and
file archival functions are handled by nautilus (GNOME Files).

nixos/modules/services/desktop-managers/pantheon.nix

@@ -306,11 +306,11 @@ in
 
     (mkIf serviceCfg.apps.enable {
       programs.evince.enable = mkDefault (notExcluded pkgs.evince);
-      programs.file-roller.enable = mkDefault (notExcluded pkgs.file-roller);
 
       environment.systemPackages = utils.removePackagesByName (
         [
           pkgs.gnome-font-viewer
+          pkgs.file-roller
         ]
         ++ (
           with pkgs.pantheon;