chore: remove nix settings from core/default.nix

profiles/core/default.nix

@@ -91,32 +91,6 @@ in {
       };
     };
 
-    nix = {
-      # use nix-dram, a patched nix command, see: https://github.com/dramforever/nix-dram
-      package = inputs.nix-dram.packages.${pkgs.system}.nix-dram;
-
-      # Improve nix store disk usage
-      autoOptimiseStore = true;
-      gc.automatic = true;
-      optimise.automatic = true;
-
-      # Prevents impurities in builds
-      useSandbox = true;
-
-      # give root and @wheel special privileges with nix
-      trustedUsers = ["root" "@wheel"];
-
-      # Generally useful nix option defaults
-      extraOptions = ''
-        min-free = 536870912
-        keep-outputs = true
-        keep-derivations = true
-        fallback = true
-        # used by nix-dram
-        default-flake = flake:nixpkgs
-      '';
-    };
-
     # For rage encryption, all hosts need a ssh key pair
     services.openssh = {
       enable = true;