ruff: apply automatic unsafe fixes

pkgs/clan-cli/clan_lib/services/instances.py

@@ -30,7 +30,7 @@ def list_service_instances(flake: Flake) -> InventoryInstancesType:
 
 def collect_tags(machines: InventoryMachinesType) -> set[str]:
     res = set()
-    for _, machine in machines.items():
+    for machine in machines.values():
         res |= set(machine.get("tags", []))
 
     return res

pkgs/clan-cli/clan_lib/services/modules.py

@@ -267,7 +267,7 @@ def create_service_instance(
 
     # TODO: Check the roles against the schema
     schema = get_service_module_schema(flake, module_ref)
-    for role_name, _role in roles.items():
+    for role_name in roles:
         if role_name not in schema:
             msg = f"Role '{role_name}' is not defined in the module schema"
             raise ClanError(msg)