SEV Fix - S258686 - pl_study_runner.py (#544)

Summary:
Pull Request resolved: #544

This is a fix for a SEV S258686.

Reviewed By: jrodal98

Differential Revision: D33835847

fbshipit-source-id: 4de96afb038034ae5eeae4db982e1dcd529721a8

Author: smartmani123

fbpcs/pl_coordinator/pl_study_runner.py

@@ -267,10 +267,7 @@ def _get_cell_obj_instance(
         # they do, select a random one.
         if created_time > cell_obj_instance[cell_id][objective_id][
             "latest_data_ts"
-        ] and (
-            created_time > current_time - INSTANCE_LIFESPAN
-            or status is PrivateComputationInstanceStatus.AGGREGATION_COMPLETED
-        ):
+        ] and (created_time > current_time - INSTANCE_LIFESPAN):
             cell_obj_instance[cell_id][objective_id]["instance_id"] = instance_data[
                 "id"
             ]