[PRMDR-699] remove string from enum params

lambdas/enums/feature_flags.py

@@ -1,7 +1,7 @@
 from enum import Enum
 
 
-class FeatureFlags(str, Enum):
+class FeatureFlags(Enum):
     NEMS_ENABLED = "nemsEnabled"
     UPLOAD_LLOYD_GEORGE_WORKFLOW_ENABLED = "uploadLloydGeorgeWorkflowEnabled"
     UPLOAD_LAMBDA_ENABLED = "uploadLambdaEnabled"