Fixed unit tests

Author: gkevinzheng

tests/unit/data/test__helpers.py

@@ -313,17 +313,6 @@ class TestGetStatusesFromMutationsExceptionGroup:
                 ),
                 status_pb2.Status(code=code_pb2.UNKNOWN, message="Something happened"),
             ),
-            (
-                0,
-                bt_exceptions.RetryExceptionGroup(
-                    excs=[
-                        core_exceptions.ServiceUnavailable("Service Unavailable"),
-                        core_exceptions.ServiceUnavailable("Service Unavailable"),
-                        None,
-                    ]
-                ),
-                status_pb2.Status(code=code_pb2.UNKNOWN, message="An unknown error has occurred"),
-            ),
             (
                 0,
                 None,