feat(cleanup): remove leviathan and elise configurations and references

systems/leviathan/default.nix

@@ -1,29 +0,0 @@
-{ inputs, ... }:
-{
-  imports = [
-    "${inputs.self}/users/elise"
-    "${inputs.self}/users/richie"
-    "${inputs.self}/common/global"
-    "${inputs.self}/common/optional/desktop.nix"
-    "${inputs.self}/common/optional/steam.nix"
-    "${inputs.self}/common/optional/systemd-boot.nix"
-    "${inputs.self}/common/optional/update.nix"
-    "${inputs.self}/common/optional/zerotier.nix"
-    "${inputs.self}/common/optional/brain_substituter.nix"
-    ./hardware.nix
-    inputs.nixos-hardware.nixosModules.framework-13-7040-amd
-  ];
-
-  networking = {
-    hostName = "leviathan";
-    hostId = "cb9b64d8";
-    firewall.enable = true;
-    networkmanager.enable = true;
-  };
-
-  services = {
-    openssh.ports = [ 332 ];
-  };
-
-  system.stateVersion = "25.05";
-}

systems/leviathan/hardware.nix

@@ -1,69 +0,0 @@
-{
-  config,
-  lib,
-  modulesPath,
-  ...
-}:
-{
-  imports = [ (modulesPath + "/installer/scan/not-detected.nix") ];
-
-  boot = {
-    initrd = {
-      availableKernelModules = [
-        "ahci"
-        "ehci_pci"
-        "nvme"
-        "sd_mod"
-        "usb_storage"
-        "usbhid"
-        "xhci_pci"
-      ];
-      kernelModules = [ ];
-      luks.devices."luks-root-pool-nvme-Samsung_SSD_970_EVO_Plus_1TB_S6S1NS0T617615W-part2" = {
-        device = "/dev/disk/by-id/nvme-Samsung_SSD_970_EVO_Plus_1TB_S6S1NS0T617615W-part2";
-        bypassWorkqueues = true;
-        allowDiscards = true;
-      };
-    };
-    kernelModules = [ "kvm-amd" ];
-    extraModulePackages = [ ];
-  };
-
-  fileSystems = {
-    "/" = lib.mkDefault {
-      device = "root_pool/root";
-      fsType = "zfs";
-    };
-
-    "/home" = {
-      device = "root_pool/home";
-      fsType = "zfs";
-    };
-
-    "/var" = {
-      device = "root_pool/var";
-      fsType = "zfs";
-    };
-
-    "/nix" = {
-      device = "root_pool/nix";
-      fsType = "zfs";
-    };
-
-    "/boot" = {
-      device = "/dev/disk/by-uuid/12CE-A600";
-      fsType = "vfat";
-      options = [
-        "fmask=0077"
-        "dmask=0077"
-      ];
-    };
-  };
-
-  swapDevices = [ ];
-
-  networking.useDHCP = lib.mkDefault true;
-
-  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
-  hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
-}