refactor: remove unused ServiceWaitingForManualIntervention exception class

Author: pcrespov

services/web/server/src/simcore_service_webserver/director_v2/exceptions.py

@@ -18,7 +18,3 @@ def __init__(self, *, status: int, reason: str, **ctx: Any) -> None:
 
 class ComputationNotFoundError(DirectorServiceError):
     msg_template = "Computation '{project_id}' not found"
-
-
-class ServiceWaitingForManualIntervention(DirectorServiceError):
-    msg_template = "Service '{service_uuid}' is waiting for user manual intervention"