clan-template: drop unused dependencies

templates/new-clan/default.nix

@@ -1,16 +0,0 @@
-# This file provides backward compatibility to nix < 2.4 clients
-let
-  flake =
-    import
-      (
-        let
-          lock = builtins.fromJSON (builtins.readFile ./flake.lock);
-        in
-        fetchTarball {
-          url = "https://github.com/edolstra/flake-compat/archive/${lock.nodes.flake-compat.locked.rev}.tar.gz";
-          sha256 = lock.nodes.flake-compat.locked.narHash;
-        }
-      )
-      { src = ./.; };
-in
-flake.defaultNix

templates/new-clan/flake.nix

@@ -1,13 +1,9 @@
 {
-  description = "";
+  description = "<Put your description here>";
 
   inputs = {
+    clan-core.url = "git+https://git.clan.lol/clan/clan-core";
     flake-parts.url = "github:hercules-ci/flake-parts";
-    flake-compat = {
-      url = "github:edolstra/flake-compat";
-      flake = false;
-    };
-    nixpkgs.url = "nixpkgs/nixos-unstable";
   };
 
   outputs = inputs @ { flake-parts, ... }:

templates/new-clan/shell.nix

@@ -1,2 +0,0 @@
-(import ./default.nix).devShells.${builtins.currentSystem}.default
-  or (throw "dev-shell not defined. Cannot find flake attribute devShell.${builtins.currentSystem}.default")