fix unused imports

Author: giancarloromeo

services/director-v2/src/simcore_service_director_v2/api/errors/validation_error.py

@@ -1,5 +1,3 @@
-from typing import Union
-
 from fastapi.encoders import jsonable_encoder
 from fastapi.exceptions import RequestValidationError
 from fastapi.openapi.constants import REF_PREFIX

services/director-v2/src/simcore_service_director_v2/utils/osparc_variables.py

@@ -4,7 +4,7 @@
 from typing import Any, Final, NamedTuple, TypeAlias
 
 from models_library.utils.specs_substitution import SubstitutionValue
-from pydantic import NonNegativeInt, TypeAdapter
+from pydantic import NonNegativeInt
 from servicelib.utils import logged_gather
 
 ContextDict: TypeAlias = dict[str, Any]