chore(inventory/services): dont check _class of legacy clanModules.

Let the module system handle the error. Once we shift to deferred
modules, things get more complicated and we cannot check the module
class eagerly

lib/inventory/build-inventory/builder/default.nix

@@ -56,7 +56,7 @@ let
       assertions = { };
     };
 
-  legacyResolveImports =
+  resolveImports =
     {
       supportedRoles,
       resolvedRolesPerInstance,
@@ -168,36 +168,16 @@ in
                 ./roles.nix
               ];
 
-              isClanModule =
-                let
-                  firstRole = import (getRoleFile (builtins.head config.supportedRoles));
-                  loadModuleForClassCheck =
-                    m:
-                    if lib.isFunction m then
-                      let
-                        args = lib.functionArgs m;
-                      in
-                      m args
-                    else
-                      m;
-                  module = loadModuleForClassCheck (firstRole);
-                in
-                if (module) ? _class then module._class == "clan" else false;
-              # The actual result
-              machineImports =
-                if config.isClanModule then
-                  throw "Clan modules are not supported yet."
-                else
-                  legacyResolveImports {
-                    supportedRoles = config.supportedRoles;
-                    resolvedRolesPerInstance = config.resolvedRolesPerInstance;
-                    inherit
-                      serviceConfigs
-                      serviceName
-                      machineName
-                      getRoleFile
-                      ;
-                  };
+              machineImports = resolveImports {
+                supportedRoles = config.supportedRoles;
+                resolvedRolesPerInstance = config.resolvedRolesPerInstance;
+                inherit
+                  serviceConfigs
+                  serviceName
+                  machineName
+                  getRoleFile
+                  ;
+              };
 
               # Assertions
               assertions = {

lib/inventory/build-inventory/builder/interface.nix

@@ -54,9 +54,6 @@ in
                             matchedRoles = mkOption {
                               type = types.listOf types.str;
                             };
-                            isClanModule = mkOption {
-                              type = types.bool;
-                            };
                             machinesRoles = mkOption {
                               type = types.attrsOf (types.listOf types.str);
                             };

lib/inventory/build-inventory/builder/roles.nix

@@ -14,7 +14,7 @@ in
 {
   # Roles resolution
   # : List String
-  supportedRoles = clanLib.modules.getRoles inventory.modules serviceName;
+  supportedRoles = clanLib.modules.getRoles "inventory.modules" inventory.modules serviceName;
   matchedRoles = builtins.attrNames (
     lib.filterAttrs (_: ms: builtins.elem machineName ms) config.machinesRoles
   );