Remove duplicate unavailable_status that had been already committed into main

Author: odeke-em

tests/mockserver_tests/mock_server_test_base.py

@@ -79,27 +79,6 @@ def unavailable_status() -> _Status:
     return status
 
 
-# Creates an UNAVAILABLE status with the smallest possible retry delay.
-def unavailable_status() -> _Status:
-    error = status_pb2.Status(
-        code=code_pb2.UNAVAILABLE,
-        message="Service unavailable.",
-    )
-    retry_info = RetryInfo(retry_delay=Duration(seconds=0, nanos=1))
-    status = _Status(
-        code=code_to_grpc_status_code(error.code),
-        details=error.message,
-        trailing_metadata=(
-            ("grpc-status-details-bin", error.SerializeToString()),
-            (
-                "google.rpc.retryinfo-bin",
-                retry_info.SerializeToString(),
-            ),
-        ),
-    )
-    return status
-
-
 def add_error(method: str, error: status_pb2.Status):
     MockServerTestBase.spanner_service.mock_spanner.add_error(method, error)