chore(flake): dont use "follows"

The feature is especially broken in nix:
    nixFlake suffers from an issue when using "follows" keyword:
    NixOS/nix#3602

    A solution here https://discourse.nixos.org/t/flake-how-make-nixpkgs-self-follow-another-inputs-nixpkgs/10867
    presents how to set self.inputs from children flakes so that's what we
    end up doing

flake.nix

@@ -16,8 +16,8 @@
     flake-utils.url = "github:numtide/flake-utils";
     pre-commit-hooks = {
       url = "github:cachix/pre-commit-hooks.nix";
-      inputs.nixpkgs.follows = "nixpkgs";
-      inputs.flake-utils.follows = "flake-utils";
+      # inputs.nixpkgs.follows = "nixpkgs";
+      # inputs.flake-utils.follows = "flake-utils";
     };
     gitignore = {
       url = "github:hercules-ci/gitignore.nix";