move away from grub

there was a forced grub re-installation from the most recent update
which broke everything. maybe due to the trans flag in the grub file
name? lol

flake.lock

@@ -61,27 +61,6 @@
         "type": "github"
       }
     },
-    "minegrub-theme": {
-      "inputs": {
-        "nixpkgs": [
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1689938346,
-        "narHash": "sha256-uB6B1c0vFwng5SHLNxR5LgPfxOW26O8TL0hCn02uwCI=",
-        "owner": "Lxtharia",
-        "repo": "minegrub-theme",
-        "rev": "b6f8a3a7e2fd22d72e2dbdaf563ad0bcb5c78e45",
-        "type": "github"
-      },
-      "original": {
-        "owner": "Lxtharia",
-        "repo": "minegrub-theme",
-        "rev": "b6f8a3a7e2fd22d72e2dbdaf563ad0bcb5c78e45",
-        "type": "github"
-      }
-    },
     "niri": {
       "inputs": {
         "niri-stable": "niri-stable",
@@ -241,7 +220,6 @@
       "inputs": {
         "clippyboard": "clippyboard",
         "home-manager": "home-manager",
-        "minegrub-theme": "minegrub-theme",
         "niri": "niri",
         "nixpkgs": "nixpkgs_2",
         "nixpkgs-stable": "nixpkgs-stable_2",

flake.nix

@@ -14,9 +14,6 @@
     home-manager.url = "github:nix-community/home-manager";
     home-manager.inputs.nixpkgs.follows = "nixpkgs";
 
-    minegrub-theme.url = "github:Lxtharia/minegrub-theme/b6f8a3a7e2fd22d72e2dbdaf563ad0bcb5c78e45";
-    minegrub-theme.inputs.nixpkgs.follows = "nixpkgs";
-
     niri.url = "github:sodiboo/niri-flake";
 
     clippyboard.url = "github:Noratrieb/clippyboard";
@@ -36,7 +33,6 @@
         specialArgs = { inherit inputs; };
         modules = [
           ./nixos/desktop.nix
-          inputs.minegrub-theme.nixosModules.default
           home-manager.nixosModules.home-manager
           {
             home-manager.useGlobalPkgs = true;

nixos/desktop.nix

@@ -16,15 +16,7 @@
   # Windows sets the hardware clock in local time by default.
   time.hardwareClockInLocalTime = true;
 
-  boot.loader.grub = {
-    enable = true;
-    device = "nodev";
-    efiSupport = true;
-    useOSProber = true;
-    minegrub-theme = {
-      enable = true;
-    };
-  };
+  boot.loader.systemd-boot.enable = true;
 
   boot.loader.efi.canTouchEfiVariables = true;
   boot.loader.efi.efiSysMountPoint = "/boot/efi";