nixosTests.sourcehut: remove unused VM image specifications

At the time of this commit, sourcehut.builds is broken and its test
infrastructure is partial at best. The specified image only inflated the closure
size without any added benefit.

nixos/tests/sourcehut.nix

@@ -10,111 +10,6 @@ let
       -addext 'subjectAltName = DNS:*.${domain}'
     install -D -t $out key.pem cert.pem
   '';
-
-  images = {
-    nixos.unstable.x86_64 =
-      let
-        systemConfig = { pkgs, ... }: {
-          # passwordless ssh server
-          services.openssh = {
-            enable = true;
-            settings = {
-              PermitRootLogin = "yes";
-              PermitEmptyPasswords = true;
-            };
-          };
-
-          users = {
-            mutableUsers = false;
-            # build user
-            extraUsers."build" = {
-              isNormalUser = true;
-              uid = 1000;
-              extraGroups = [ "wheel" ];
-              password = "";
-            };
-            users.root.password = "";
-          };
-
-          security.sudo.wheelNeedsPassword = false;
-          nix.settings.trusted-users = [ "root" "build" ];
-          documentation.nixos.enable = false;
-
-          # builds.sr.ht-image-specific network settings
-          networking = {
-            hostName = "build";
-            dhcpcd.enable = false;
-            defaultGateway.address = "10.0.2.2";
-            usePredictableInterfaceNames = false;
-            interfaces."eth0".ipv4.addresses = [{
-              address = "10.0.2.15";
-              prefixLength = 25;
-            }];
-            enableIPv6 = false;
-            nameservers = [
-              # OpenNIC anycast
-              "185.121.177.177"
-              "169.239.202.202"
-              # Google
-              "8.8.8.8"
-            ];
-            firewall.allowedTCPPorts = [ 22 ];
-          };
-
-          environment.systemPackages = [
-            pkgs.gitMinimal
-            #pkgs.mercurial
-            pkgs.curl
-            pkgs.gnupg
-          ];
-        };
-        qemuConfig = { pkgs, ... }: {
-          imports = [ systemConfig ];
-          fileSystems."/".device = "/dev/disk/by-label/nixos";
-          boot.initrd.availableKernelModules = [
-            "ahci"
-            "ehci_pci"
-            "sd_mod"
-            "usb_storage"
-            "usbhid"
-            "virtio_balloon"
-            "virtio_blk"
-            "virtio_pci"
-            "virtio_ring"
-            "xhci_pci"
-          ];
-          boot.loader = {
-            grub = {
-              version = 2;
-              device = "/dev/vda";
-            };
-            timeout = 0;
-          };
-        };
-        config = (import (pkgs.path + "/nixos/lib/eval-config.nix") {
-          inherit pkgs; modules = [ qemuConfig ];
-          system = "x86_64-linux";
-        }).config;
-      in
-      import (pkgs.path + "/nixos/lib/make-disk-image.nix") {
-        inherit pkgs lib config;
-        diskSize = 16000;
-        format = "qcow2-compressed";
-        contents = [
-          { source = pkgs.writeText "gitconfig" ''
-              [user]
-                name = builds.sr.ht
-                email = build@sr.ht
-            '';
-            target = "/home/build/.gitconfig";
-            user = "build";
-            group = "users";
-            mode = "644";
-          }
-        ];
-      };
-  };
-
 in
 {
   name = "sourcehut";
@@ -149,7 +44,7 @@ in
         enable = true;
         # FIXME: see why it does not seem to activate fully.
         #enableWorker = true;
-        inherit images;
+        images = { };
       };
       git.enable = true;