Chore: remove unsued inventory example

lib/inventory/example.nix

@@ -1,39 +0,0 @@
-{ self, ... }:
-self.lib.buildClan {
-  # Name of the clan in the UI, should be unique
-  meta.name = "Inventory clan";
-
-  # Should usually point to the directory of flake.nix
-  directory = self;
-
-  inventory = {
-    services = {
-      borgbackup.instance_1 = {
-        roles.server.machines = [ "backup_server" ];
-        roles.client.tags = [ "backup" ];
-      };
-    };
-  };
-
-  # merged with
-  machines = {
-    "backup_server" = {
-      clan.tags = [ "all" ];
-      # ... rest of the machine config
-    };
-    "client_1_machine" = {
-      clan.tags = [
-        "all"
-        "backup"
-      ];
-    };
-    "client_2_machine" = {
-      clan.tags = [
-        "all"
-        "backup"
-      ];
-      # Name of the machine in the UI
-      clan.meta.name = "camina";
-    };
-  };
-}

lib/inventory/flake-module.nix

@@ -5,8 +5,6 @@ let
   );
 in
 {
-  flake.inventory = import ./example.nix { inherit self; };
-
   perSystem =
     {
       pkgs,