fix: resolve flake8 lint violations (E704 overload stubs, F401 unused import)

Author: Dongbumlee

src/ContentProcessorWorkflow/src/repositories/model/claim_process.py

@@ -25,8 +25,6 @@
 from pydantic import Field
 from sas.cosmosdb.mongo.model import EntityBase, RootEntityBase
 
-from steps.rai.executor.rai_executor import RAIExecutor
-
 
 class Claim_Steps(str, Enum):
     """