[AI-FSSDK] [FSSDK-12337] Remove ExperimentTypes class, simplify type check

- Remove redundant ExperimentTypes class from enums.py (ExperimentType Literal suffices)
- Simplify getattr(experiment, 'type', None) to experiment.type

Author: FarhanAnjum-opti

optimizely/helpers/enums.py

@@ -102,13 +102,6 @@ class DecisionSources:
     HOLDOUT: Final = 'holdout'
 
 
-class ExperimentTypes:
-    AB: Final = 'a/b'
-    MAB: Final = 'mab'
-    CMAB: Final = 'cmab'
-    FEATURE_ROLLOUT: Final = 'feature_rollout'
-
-
 class Errors:
     INVALID_ATTRIBUTE: Final = 'Provided attribute is not in datafile.'
     INVALID_ATTRIBUTE_FORMAT: Final = 'Attributes provided are in an invalid format.'

optimizely/project_config.py

@@ -237,7 +237,7 @@ def __init__(self, datafile: str | bytes, logger: Logger, error_handler: Any):
             everyone_else_variation = self._get_everyone_else_variation(feature)
             if everyone_else_variation is not None:
                 for experiment in rules:
-                    if getattr(experiment, 'type', None) == enums.ExperimentTypes.FEATURE_ROLLOUT:
+                    if experiment.type == 'feature_rollout':
                         experiment.variations.append(everyone_else_variation)
                         experiment.trafficAllocation.append({
                             'entityId': everyone_else_variation['id'],