Fix lint

Author: lforst

test/io/test_io.py

@@ -1258,7 +1258,7 @@ def test_shutdown_wait_period_delays_sigterm(defaultenv):
     with run(env=env, wait_max_seconds=3) as postgrest:
         start_time = time.time()
         postgrest.process.send_signal(signal.SIGTERM)
-        exitCode = wait_until_exit(postgrest, timeout=3)
+        wait_until_exit(postgrest, timeout=3)
         elapsed = time.time() - start_time
 
         assert elapsed >= 1.0, f"Should delay at least 1 second, but only waited {elapsed}s"
@@ -1275,7 +1275,7 @@ def test_sigint_exits_immediately_with_shutdown_wait_period(defaultenv):
     with run(env=env) as postgrest:
         start_time = time.time()
         postgrest.process.send_signal(signal.SIGINT)
-        exitCode = wait_until_exit(postgrest, timeout=2)
+        wait_until_exit(postgrest, timeout=2)
         elapsed = time.time() - start_time
 
         assert elapsed < 1.0, f"SIGINT should exit immediately, but waited {elapsed}s"