iris: drop unneeded pytestmark timeout from finelog startup test

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: ravwojdyla

lib/iris/tests/cluster/controller/test_finelog_startup.py

@@ -10,11 +10,8 @@
 
 import time
 
-import pytest
 from finelog.client import LogClient
 
-pytestmark = pytest.mark.timeout(15)
-
 
 def test_controller_starts_when_finelog_table_registration_fails(make_controller, monkeypatch):
     real_get_table = LogClient.get_table