Revert "Add simple CPU offloading support" (#2252)

We'll re-add the commit to correctly ack Kaichao's authorship

test/srt/test_srt_engine.py

@@ -152,37 +152,7 @@ class TestSRTEngine(unittest.TestCase):
 
         self.assertTrue(torch.allclose(out1, out2, atol=1e-5, rtol=1e-3))
 
-    def test_7_engine_cpu_offload(self):
-        prompt = "Today is a sunny day and I like"
-        model_path = DEFAULT_SMALL_MODEL_NAME_FOR_TEST
-
-        sampling_params = {"temperature": 0, "max_new_tokens": 8}
-
-        engine = sgl.Engine(
-            model_path=model_path,
-            random_seed=42,
-            max_total_tokens=128,
-        )
-        out1 = engine.generate(prompt, sampling_params)["text"]
-        engine.shutdown()
-
-        engine = sgl.Engine(
-            model_path=model_path,
-            random_seed=42,
-            max_total_tokens=128,
-            cpu_offload_gb=3,
-        )
-        out2 = engine.generate(prompt, sampling_params)["text"]
-        engine.shutdown()
-
-        print("==== Answer 1 ====")
-        print(out1)
-
-        print("==== Answer 2 ====")
-        print(out2)
-        self.assertEqual(out1, out2)
-
-    def test_8_engine_offline_throughput(self):
+    def test_7_engine_offline_throughput(self):
         server_args = ServerArgs(
             model_path=DEFAULT_SMALL_MODEL_NAME_FOR_TEST,
         )