feat: update flake.

shell.nix

@@ -1,32 +1,24 @@
-{ pkgs ? (
+{
+  pkgs ? (
     let
       inherit (builtins) fetchTree fromJSON readFile;
       inherit ((fromJSON (readFile ./flake.lock)).nodes) nixpkgs gomod2nix;
     in
-    import (fetchTree nixpkgs.locked) {
-      overlays = [
-        (import "${fetchTree gomod2nix.locked}/overlay.nix")
-      ];
-    }
-  )
-, mkGoEnv ? pkgs.mkGoEnv
-, gomod2nix ? pkgs.gomod2nix
-, pre-commit-hooks
-}:
-
-let
-  goEnv = mkGoEnv { pwd = ./.; };
-  pre-commit-check = pre-commit-hooks.lib.${pkgs.system}.run {
-      src = ./.;
-      hooks = {
-          gofmt.enable = true;
-      };
-  };
+      import (fetchTree nixpkgs.locked) {
+        overlays = [
+          (import "${fetchTree gomod2nix.locked}/overlay.nix")
+        ];
+      }
+  ),
+  mkGoEnv ? pkgs.mkGoEnv,
+  gomod2nix ? pkgs.gomod2nix,
+}: let
+  goEnv = mkGoEnv {pwd = ./.;};
 in
-pkgs.mkShell {
-  inherit (pre-commit-check) shellHook;
-  packages = [
-    goEnv
-    gomod2nix
-  ];
-}
+  pkgs.mkShell {
+    packages = [
+      goEnv
+      gomod2nix
+      pkgs.gopls
+    ];
+  }