[CI] Reorganize the 8 gpu tests (#6192)

test/srt/test_disaggregation.py

@@ -1,11 +1,9 @@
 import subprocess
-import threading
 import time
 import unittest
 from types import SimpleNamespace
 
 import requests
-import torch
 
 from sglang.srt.utils import kill_process_tree
 from sglang.test.few_shot_gsm8k import run_eval as run_eval_few_shot_gsm8k