remove unused stuff

hosts/git/default.nix

@@ -4,25 +4,6 @@
   pkgs,
   ...
 }:
-let
-  generatedAliases = pkgs.writeText "generated-aliases" (
-    lib.concatStringsSep "\n" (
-      lib.mapCartesianProduct
-        ({ aliases, domain }: "${aliases}@${domain}  root@test.htw.stura-dresden.de")
-        {
-          aliases = [
-            "abuse"
-            "hostmaster"
-            "noreply"
-            "postmaster"
-            "webmaster"
-          ];
-          domain = config.mailserver.domains;
-        }
-    )
-  );
-
-in
 {
   imports = [
     ./hardware-configuration.nix
@@ -39,10 +20,8 @@ in
 
     defaultGateway.address = "141.56.51.254";
     firewall.allowedTCPPorts = [
-      25
       80
       443
-      597
     ];
   };