[CI] remove itl testing due to unstable networking (#19904)

test/registered/distributed/test_disaggregation_dp_attention.py

@@ -125,23 +125,6 @@ class TestDisaggregationDPAttentionRoundRobin(TestDisaggregationDPAttention):
         self.assertLess(result["mean_tpot_ms"], 20)
         self.assertEqual(result["completed"], 1000)
 
-    def test_bench_serving_itl(self):
-        num_prompts = 512
-        args = get_benchmark_args(
-            base_url=f"http://{self.base_host}:{self.lb_port}",
-            dataset_name="random",
-            tokenizer=self.model,
-            num_prompts=num_prompts,
-            random_input_len=512,
-            random_output_len=64,
-            request_rate=float("inf"),
-            max_concurrency=64,
-        )
-        result = run_benchmark(args)
-
-        self.assertEqual(result["completed"], num_prompts)
-        self.assertLess(result["p99_itl_ms"], 20)
-
 
 @unittest.skip(
     "Skip this test until new testing logic in mini-lb has been updated in docker image."