chore: remove ssh configuration

Actually, I misread the tutorial, this configuration should be done on
the remote machine.

nixos/configuration.nix

@@ -366,16 +366,6 @@ in
     dockerSocket.enable = true;
   };
 
-  # configure ssh
-  programs.ssh = {
-    # ensure remote nix build can acces nix environment
-    # https://wiki.nixos.org/wiki/Distributed_build
-    extraConfig = ''
-      Host void
-        SetEnv PATH=/nix/var/nix/profiles/default/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
-    '';
-  };
-
   # This value determines the NixOS release from which the default
   # settings for stateful data, like file locations and database versions
   # on your system were taken. It‘s perfectly fine and recommended to leave