test: remove check tail assertion from correctness test (#55)

Author: quettabit

tests/test_correctness.py

@@ -66,6 +66,3 @@ async def append_records() -> None:
     async with asyncio.TaskGroup() as task_group:
         task_group.create_task(read_records())
         task_group.create_task(append_records())
-
-    tail = await stream.check_tail()
-    assert tail.seq_num == TOTAL_RECORDS