Fix: Use nix flake check for hooks, simplify module, remove apps

flake.nix

@@ -50,13 +50,14 @@
   };
 
   outputs =
-    { self
-    , nixpkgs
-    , home-manager
-    , nix-on-droid
-    , nixgl
-    , git-hooks
-    , ...
+    {
+      self,
+      nixpkgs,
+      home-manager,
+      nix-on-droid,
+      nixgl,
+      git-hooks,
+      ...
     }@inputs:
     let
       inherit (self) outputs;
@@ -65,11 +66,13 @@
       hostDirNames = utils.dirNames ./hosts;
       system = "x86_64-linux";
       dotsPath = ./dots;
+      pkgs = import nixpkgs { inherit system; };
     in
     {
       nix.nixPath = [
         "nixpkgs=${inputs.nixpkgs}"
-      ]; # <https://github.com/nix-community/nixd/blob/main/nixd/docs/configuration.md>
+      ];
+
       nixosConfigurations =
         (lib.genAttrs hostDirNames (
           host:
@@ -103,6 +106,7 @@
             };
           };
         };
+
       homeConfigurations = {
         work = home-manager.lib.homeManagerConfiguration {
           pkgs = import nixpkgs {
@@ -115,7 +119,7 @@
           };
         };
       };
-      # https://github.com/nix-community/nix-on-droid/blob/master/templates/advanced/flake.nix
+
       nixOnDroidConfigurations = {
         pixel = nix-on-droid.lib.nixOnDroidConfiguration {
           modules = [ ./phone ];
@@ -140,30 +144,12 @@
       checks.${system}.pre-commit-check = git-hooks.lib.${system}.run {
         src = ./.;
         hooks = {
-          nixpkgs-fmt.enable = true;
+          nixfmt.enable = true;
           statix.enable = true;
+          deadnix.enable = true;
         };
       };
 
-      apps.${system}.pre-commit-install =
-        let
-          hooks = git-hooks.lib.${system}.run {
-            src = ./.;
-            hooks = {
-              nixpkgs-fmt.enable = true;
-              statix.enable = true;
-            };
-          };
-        in
-        {
-          type = "app";
-          program = toString (
-            pkgs.writeShellScript "install-hooks" ''
-              ${hooks.shellHook}
-            ''
-          );
-        };
-
       images.sd-image-aarch64 = self.nixosConfigurations.sd-image-aarch64.config.system.build.sdImage;
     };
 }