clan-cli: remove unused test fixture

pkgs/clan-cli/clan_cli/tests/test_flake_with_core_dynamic_machines/flake.nix

@@ -1,24 +0,0 @@
-{
-  # Use this path to our repo root e.g. for UI test
-  # inputs.clan-core.url = "../../../../.";
-
-  # this placeholder is replaced by the path to nixpkgs
-  inputs.clan-core.url = "__CLAN_CORE__";
-
-  outputs =
-    { self, clan-core }:
-    let
-      clan = clan-core.lib.clan {
-        inherit self;
-        meta.name = "test_flake_with_core_dynamic_machines";
-        machines =
-          let
-            machineModules = builtins.readDir (self + "/machines");
-          in
-          builtins.mapAttrs (name: _type: import (self + "/machines/${name}")) machineModules;
-      };
-    in
-    {
-      inherit (clan.config) nixosConfigurations nixosModules clanInternals;
-    };
-}