refactor: fix duplicated fastfetch invocations

hosts/shared/nixos-server.nix

@@ -4,7 +4,6 @@
 }:
 {
   imports = [
-    ../../features/bash.nix
     ../../features/vim.nix
     ../../features/docker.nix
     ../../features/libvirt.nix
@@ -17,6 +16,8 @@
     ./nix-package-manager.nix
   ];
 
+  programs.bash.enable = true;
+
   services = {
     openssh.enable = true;
     resolved.enable = false;