Revert "buildClan: Add automatic inventory import directory"

This reverts commit a64c054168.

This introduces the name "inventory module" whereas we already use the
term clan modules everywhere else. I don't don't too many confusing
termologies in the codebase. Let's discuss this before adding it back.

lib/build-clan/module.nix

@@ -167,7 +167,6 @@ let
       (builtins.fromJSON (builtins.readFile inventoryFile))
     else
       { };
-
 in
 {
   imports = [
@@ -190,9 +189,7 @@ in
       inventory.machines = lib.mapAttrs (_n: _: { }) config.machines;
     }
     # Merge the meta attributes from the buildClan function
-    {
-      inventory.modules = clan-core.clanModules;
-    }
+    { inventory.modules = clan-core.clanModules; }
     # config.inventory.meta <- config.meta
     { inventory.meta = config.meta; }
     # Set default for computed tags