AutoOptimizeStore changed to new syntax.

configuration.nix

@@ -200,23 +200,3 @@
   # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
   system.stateVersion = "22.05"; # Did you read the comment?
 
-
-##### nix extra options #######
-
-  nix = {
-    extraOptions = ''
-      experimental-features = nix-command flakes	
-      keep-outputs = true
-      keep-derivations = true
-    '';
-#    package = pkgs.nixFlakes;
-    gc = {
-      automatic = true;
-      dates = "weekly";
-      options = "--delete-older-than 7d";
-      persistent = true;
-    };
-    autoOptimiseStore = true;
-  };
-
-}